Finding the Fourth Proportional to 172,116.53, 258,275.84 and 72,269.04

Step by Step Solution

1. Step 1: Write the proportion equation
   172,116.53 : 258,275.84 = 72,269.04 : x
2. Step 2: Convert to fraction form
   172,116.53/258,275.84 = 72,269.04/x
3. Step 3: Cross multiply
   172,116.53x = 258,275.84 × 72,269.04
4. Step 4: Simplify right side
   172,116.53x = 18,665,348,025.70
5. Step 5: Solve for x
   x = 18,665,348,025.70/172,116.53
6. Step 6: Final answer
   x = 108,445.99