Finding the Fourth Proportional to 124,908, 172,368.70 and 71,210.31

Step by Step Solution

1. Step 1: Write the proportion equation
   124,908 : 172,368.70 = 71,210.31 : x
2. Step 2: Convert to fraction form
   124,908/172,368.70 = 71,210.31/x
3. Step 3: Cross multiply
   124,908x = 172,368.70 × 71,210.31
4. Step 4: Simplify right side
   124,908x = 12,274,428,561.30
5. Step 5: Solve for x
   x = 12,274,428,561.30/124,908
6. Step 6: Final answer
   x = 98,267.75