Finding the Fourth Proportional to 124,020.71, 171,118.60 and 78,682.38

Step by Step Solution

1. Step 1: Write the proportion equation
   124,020.71 : 171,118.60 = 78,682.38 : x
2. Step 2: Convert to fraction form
   124,020.71/171,118.60 = 78,682.38/x
3. Step 3: Cross multiply
   124,020.71x = 171,118.60 × 78,682.38
4. Step 4: Simplify right side
   124,020.71x = 13,464,018,710.27
5. Step 5: Solve for x
   x = 13,464,018,710.27/124,020.71
6. Step 6: Final answer
   x = 108,562.66