Finding the Fourth Proportional to 99,641.24, 137,498.02 and 56,040.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,641.24 : 137,498.02 = 56,040.32 : x
2. Step 2: Convert to fraction form
   99,641.24/137,498.02 = 56,040.32/x
3. Step 3: Cross multiply
   99,641.24x = 137,498.02 × 56,040.32
4. Step 4: Simplify right side
   99,641.24x = 7,705,433,040.17
5. Step 5: Solve for x
   x = 7,705,433,040.17/99,641.24
6. Step 6: Final answer
   x = 77,331.77