Finding the Fourth Proportional to 124,727.27, 172,123.31 and 68,139.05

Step by Step Solution

1. Step 1: Write the proportion equation
   124,727.27 : 172,123.31 = 68,139.05 : x
2. Step 2: Convert to fraction form
   124,727.27/172,123.31 = 68,139.05/x
3. Step 3: Cross multiply
   124,727.27x = 172,123.31 × 68,139.05
4. Step 4: Simplify right side
   124,727.27x = 11,728,317,624.94
5. Step 5: Solve for x
   x = 11,728,317,624.94/124,727.27
6. Step 6: Final answer
   x = 94,031.71