Finding the Fourth Proportional to 99,498.69, 137,309.15 and 57,049.02

Step by Step Solution

1. Step 1: Write the proportion equation
   99,498.69 : 137,309.15 = 57,049.02 : x
2. Step 2: Convert to fraction form
   99,498.69/137,309.15 = 57,049.02/x
3. Step 3: Cross multiply
   99,498.69x = 137,309.15 × 57,049.02
4. Step 4: Simplify right side
   99,498.69x = 7,833,352,159.29
5. Step 5: Solve for x
   x = 7,833,352,159.29/99,498.69
6. Step 6: Final answer
   x = 78,728.19