Finding the Fourth Proportional to 99,593.15, 137,433.24 and 57,148.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,593.15 : 137,433.24 = 57,148.88 : x
2. Step 2: Convert to fraction form
   99,593.15/137,433.24 = 57,148.88/x
3. Step 3: Cross multiply
   99,593.15x = 137,433.24 × 57,148.88
4. Step 4: Simplify right side
   99,593.15x = 7,854,155,053.61
5. Step 5: Solve for x
   x = 7,854,155,053.61/99,593.15
6. Step 6: Final answer
   x = 78,862.41