i searched alot but didn't got the right way to do this.

http://moneyzzsharma.comze.com/

on this website there are there columns down of orange color.

col1 is float:left

col2 is float:left with 4% horizontal margin

col3 is float:right

please tell me how to make them of equal height(like col1 and col3 must be as longer as col2)

please avoid height:100% and also height:--PX as i don't wanna have height of fixed size