Finding the Fourth Proportional to 124,917, 172,381.12 and 71,219.31

Step by Step Solution

1. Step 1: Write the proportion equation
   124,917 : 172,381.12 = 71,219.31 : x
2. Step 2: Convert to fraction form
   124,917/172,381.12 = 71,219.31/x
3. Step 3: Cross multiply
   124,917x = 172,381.12 × 71,219.31
4. Step 4: Simplify right side
   124,917x = 12,276,864,423.43
5. Step 5: Solve for x
   x = 12,276,864,423.43/124,917
6. Step 6: Final answer
   x = 98,280.17