How do I line up 3 divs on the same row?

I'm surprised that nobody gave CSS table layout as a solution:

.Row {
    display: table;
    width: 100%; /*Optional*/
    table-layout: fixed; /*Optional*/
    border-spacing: 10px; /*Optional*/
}
.Column {
    display: table-cell;
    background-color: red; /*Optional*/
}
<div class="Row">
    <div class="Column">C1</div>
    <div class="Column">C2</div>
    <div class="Column">C3</div>
</div>

Works in IE8+

Check out a JSFiddle Demo


See my code

.float-left {
    float:left;
    width:300px; // or 33% for equal width independent of parent width
}
<div>
    <h2 align="center">San Andreas: Multiplayer</h2>
    <div align="center" class="float-left">CONTENT OF COLUMN ONE GOES HERE</div>
    <div align="center" class="float-left">CONTENT OF COLUMN TWO GOES HERE</div>
    <div align="center" class="float-left">CONTENT OF COLUMN THREE GOES HERE</div>
</div>

I'm not sure how I ended up on this post but since most of the answers are using floats, absolute positioning, and other options which aren't optimal now a days, I figured I'd give a new answer that's more up to date on it's standards (float isn't really kosher anymore).

.parent {
  display: flex;
  flex-direction:row;
}

.column {
  flex: 1 1 0px;
  border: 1px solid black;
}
<div class="parent">
    <div class="column">Column 1</div>
    <div class="column">Column 2<br>Column 2<br>Column 2<br>Column 2<br></div>
    <div class="column">Column 3</div>
</div>

2019 answer:

Using CSS grid:

.parent {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr;
}

here are two samples: http://jsfiddle.net/H5q5h/1/

one uses float:left and a wrapper with overflow:hidden. the wrapper ensures the sibling of the wrapper starts below the wrapper.

the 2nd one uses the more recent display:inline-block and wrapper can be disregarded. but this is not generally supported by older browsers so tread lightly on this one. also, any white space between the items will cause an unnecessary "margin-like" white space on the left and right of the item divs.