Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 35

x=38.2

Set the product of the means equal to the product of the extremes and solve for the variable. $x \times793=472\times 64.2$ $793x=30302.4$ $793x\div793=30302.4\div793$ $x=38.\underset\uparrow212$ Since the digit to the right of the 3rd significant digit is less than 5, round down.