Finding the Fourth Proportional to 52,529.86, 72,489.90 and 28,657

Step by Step Solution

1. Step 1: Write the proportion equation
   52,529.86 : 72,489.90 = 28,657 : x
2. Step 2: Convert to fraction form
   52,529.86/72,489.90 = 28,657/x
3. Step 3: Cross multiply
   52,529.86x = 72,489.90 × 28,657
4. Step 4: Simplify right side
   52,529.86x = 2,077,343,064.30
5. Step 5: Solve for x
   x = 2,077,343,064.30/52,529.86
6. Step 6: Final answer
   x = 39,545.95