Finding the Fourth Proportional to 17,280.38, 25,915.17 and 5,591.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,280.38 : 25,915.17 = 5,591.18 : x
2. Step 2: Convert to fraction form
   17,280.38/25,915.17 = 5,591.18/x
3. Step 3: Cross multiply
   17,280.38x = 25,915.17 × 5,591.18
4. Step 4: Simplify right side
   17,280.38x = 144,896,380.20
5. Step 5: Solve for x
   x = 144,896,380.20/17,280.38
6. Step 6: Final answer
   x = 8,385.02