Finding the Fourth Proportional to 72,569.97, 108,861.84 and 28,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,569.97 : 108,861.84 = 28,200.15 : x
2. Step 2: Convert to fraction form
   72,569.97/108,861.84 = 28,200.15/x
3. Step 3: Cross multiply
   72,569.97x = 108,861.84 × 28,200.15
4. Step 4: Simplify right side
   72,569.97x = 3,069,920,217.28
5. Step 5: Solve for x
   x = 3,069,920,217.28/72,569.97
6. Step 6: Final answer
   x = 42,302.90