Finding the Fourth Proportional to 72,505.28, 108,758.88 and 28,134.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,505.28 : 108,758.88 = 28,134.56 : x
2. Step 2: Convert to fraction form
   72,505.28/108,758.88 = 28,134.56/x
3. Step 3: Cross multiply
   72,505.28x = 108,758.88 × 28,134.56
4. Step 4: Simplify right side
   72,505.28x = 3,059,883,234.89
5. Step 5: Solve for x
   x = 3,059,883,234.89/72,505.28
6. Step 6: Final answer
   x = 42,202.21