HELP!!!!!!!!! An advertising sales representative has sales totaling $4500. For these sales, the representative earns a commission of $360. Which proportion could be used to find the commission amount for sales totaling $15,000?

A. 360/4500 = 15,000/x

B. 360/4500 = x/15,000

C. 4500/x=360/15,000

D. x/360=4500/15,000