Finding the Fourth Proportional to 124,978.38, 172,470.16 and 68,389.76

Step by Step Solution

1. Step 1: Write the proportion equation
   124,978.38 : 172,470.16 = 68,389.76 : x
2. Step 2: Convert to fraction form
   124,978.38/172,470.16 = 68,389.76/x
3. Step 3: Cross multiply
   124,978.38x = 172,470.16 × 68,389.76
4. Step 4: Simplify right side
   124,978.38x = 11,795,192,849.56
5. Step 5: Solve for x
   x = 11,795,192,849.56/124,978.38
6. Step 6: Final answer
   x = 94,377.87