Clear floated divs

I have set of divs that I am positioning with floats. They are laid out in a certain order...

A B C D

What I ultimately need to do is display A, C, and D on line 1 and B on line 2. I came up with an approach that comes close but still isn't exactly what I need. I float A, C, and D left and the float B right so that we have

A C D B

The divs are at least in the correct order but still on the same line. Then the issue is that I have no way to clear B since clearing it will also bring C and D to the next line. Does anyone know a way to do this?

Thanks!!!