Finding the Fourth Proportional to 72,936.10, 109,404.15 and 72,475.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,936.10 : 109,404.15 = 72,475.30 : x
2. Step 2: Convert to fraction form
   72,936.10/109,404.15 = 72,475.30/x
3. Step 3: Cross multiply
   72,936.10x = 109,404.15 × 72,475.30
4. Step 4: Simplify right side
   72,936.10x = 7,929,098,592.50
5. Step 5: Solve for x
   x = 7,929,098,592.50/72,936.10
6. Step 6: Final answer
   x = 108,712.95