Finding the Fourth Proportional to 52,651.50, 72,658.47 and 28,778.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,651.50 : 72,658.47 = 28,778.10 : x
2. Step 2: Convert to fraction form
   52,651.50/72,658.47 = 28,778.10/x
3. Step 3: Cross multiply
   52,651.50x = 72,658.47 × 28,778.10
4. Step 4: Simplify right side
   52,651.50x = 2,090,972,715.51
5. Step 5: Solve for x
   x = 2,090,972,715.51/52,651.50
6. Step 6: Final answer
   x = 39,713.45