Finding the Fourth Proportional to 28,502.56, 42,757.88 and 8,782.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,502.56 : 42,757.88 = 8,782.72 : x
2. Step 2: Convert to fraction form
   28,502.56/42,757.88 = 8,782.72/x
3. Step 3: Cross multiply
   28,502.56x = 42,757.88 × 8,782.72
4. Step 4: Simplify right side
   28,502.56x = 375,530,487.83
5. Step 5: Solve for x
   x = 375,530,487.83/28,502.56
6. Step 6: Final answer
   x = 13,175.32