Finding the Fourth Proportional to 124,713, 172,107.72 and 68,128.02

Step by Step Solution

1. Step 1: Write the proportion equation
   124,713 : 172,107.72 = 68,128.02 : x
2. Step 2: Convert to fraction form
   124,713/172,107.72 = 68,128.02/x
3. Step 3: Cross multiply
   124,713x = 172,107.72 × 68,128.02
4. Step 4: Simplify right side
   124,713x = 11,725,358,190.31
5. Step 5: Solve for x
   x = 11,725,358,190.31/124,713
6. Step 6: Final answer
   x = 94,018.73