The figure has been attached, to complement the question.
Given that J is the centroid, it means that J divides sides CD, DE and CE into two equal parts respectively and as such the following relationship exist:
First you get both distances 9.3 x 107 = 995.1 miles 8.87 x 108 = 957.96 miles then you subtract them both 995.1 - 957.96 = 37.14 miles and 37.14 miles is the distance between Earth and Saturn.