Finding the Fourth Proportional to 124,978.17, 172,469.39 and 67,617.30

Step by Step Solution

1. Step 1: Write the proportion equation
   124,978.17 : 172,469.39 = 67,617.30 : x
2. Step 2: Convert to fraction form
   124,978.17/172,469.39 = 67,617.30/x
3. Step 3: Cross multiply
   124,978.17x = 172,469.39 × 67,617.30
4. Step 4: Simplify right side
   124,978.17x = 11,661,914,793.12
5. Step 5: Solve for x
   x = 11,661,914,793.12/124,978.17
6. Step 6: Final answer
   x = 93,311.61