Solving Basic AC Analysis: Find RMS Voltage Across R3

[Jason03]

Heres a problem I was working on that I just was checking to make sure I attempted correctly...Im mechanical but had to go back and refresh on basic circuit laws...


The question is just to find the RMS voltage across R₃


Heres my work...

http://img205.imageshack.us/img205/4098/cirgl5.jpg"

 

[Defennder]

Looks ok to me.