Finding the Fourth Proportional to 72,151.14, 108,248.55 and 51,131.85

Step by Step Solution

1. Step 1: Write the proportion equation
   72,151.14 : 108,248.55 = 51,131.85 : x
2. Step 2: Convert to fraction form
   72,151.14/108,248.55 = 51,131.85/x
3. Step 3: Cross multiply
   72,151.14x = 108,248.55 × 51,131.85
4. Step 4: Simplify right side
   72,151.14x = 5,534,948,621.32
5. Step 5: Solve for x
   x = 5,534,948,621.32/72,151.14
6. Step 6: Final answer
   x = 76,713.25