Finding the Fourth Proportional to 129,404.67, 178,573.78 and 72,042.52

Step by Step Solution

1. Step 1: Write the proportion equation
   129,404.67 : 178,573.78 = 72,042.52 : x
2. Step 2: Convert to fraction form
   129,404.67/178,573.78 = 72,042.52/x
3. Step 3: Cross multiply
   129,404.67x = 178,573.78 × 72,042.52
4. Step 4: Simplify right side
   129,404.67x = 12,864,904,754.88
5. Step 5: Solve for x
   x = 12,864,904,754.88/129,404.67
6. Step 6: Final answer
   x = 99,416.08