Finding the Fourth Proportional to 129,548.88, 178,772.72 and 72,185.24

Step by Step Solution

1. Step 1: Write the proportion equation
   129,548.88 : 178,772.72 = 72,185.24 : x
2. Step 2: Convert to fraction form
   129,548.88/178,772.72 = 72,185.24/x
3. Step 3: Cross multiply
   129,548.88x = 178,772.72 × 72,185.24
4. Step 4: Simplify right side
   129,548.88x = 12,904,750,443.86
5. Step 5: Solve for x
   x = 12,904,750,443.86/129,548.88
6. Step 6: Final answer
   x = 99,612.98