Center of Mass coordinates Question

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Homework Statement

Four masses are connected by 17.4 cm long, massless, rigid rods. If massA=105.0 g, massB=231.0 g, massC=204.0 g, and massD=248.0 g, what are the coordinates of the center of mass if the origin is located at mass A?
See attached picture.

Homework Equations

X_c.m = $\sum$Δm x

The Attempt at a Solution

X_c.m = (0*105)+(248*17.4)+(204*17.4)+(231*17.4)/788
=16.24

How do you find the x and y coordinates?

 

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Here is the picture.