Finding the Fourth Proportional to 124,689.16, 172,016.22 and 74,359

Step by Step Solution

1. Step 1: Write the proportion equation
   124,689.16 : 172,016.22 = 74,359 : x
2. Step 2: Convert to fraction form
   124,689.16/172,016.22 = 74,359/x
3. Step 3: Cross multiply
   124,689.16x = 172,016.22 × 74,359
4. Step 4: Simplify right side
   124,689.16x = 12,790,954,102.98
5. Step 5: Solve for x
   x = 12,790,954,102.98/124,689.16
6. Step 6: Final answer
   x = 102,582.73