Finding the Fourth Proportional to 124,738.30, 172,089.98 and 76,908.61

Step by Step Solution

1. Step 1: Write the proportion equation
   124,738.30 : 172,089.98 = 76,908.61 : x
2. Step 2: Convert to fraction form
   124,738.30/172,089.98 = 76,908.61/x
3. Step 3: Cross multiply
   124,738.30x = 172,089.98 × 76,908.61
4. Step 4: Simplify right side
   124,738.30x = 13,235,200,296.28
5. Step 5: Solve for x
   x = 13,235,200,296.28/124,738.30
6. Step 6: Final answer
   x = 106,103.75