Verify Result of a Calculation

Question

In the journal: "A Closed Form Solution for the Similarity Transformation Parameters of Two Planar Point Sets", I cannot get same value for scaling factor for the same problem in the journal. Here is the problem :

Suppose

Scaling factor (c) can be found using equation (23) in the journal :

Where :

In the Journal value for c is 0.7211, but I cannot get the same value. My value for c is -0.6102, and for other variable : E1 = -4.160 , E2 = -2.126, E3 = 5.0 , E4 = 1.667.

I want to ask you to verify value for scaling factor (c) and for E1, E2,E3 and E4.

Thank you.

Answer 1

Actually there is a typo in equation E1 and E2, the correct one is :