Finding the Fourth Proportional to 11,280.24, 15,557.29 and 8,454.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,280.24 : 15,557.29 = 8,454.25 : x
2. Step 2: Convert to fraction form
   11,280.24/15,557.29 = 8,454.25/x
3. Step 3: Cross multiply
   11,280.24x = 15,557.29 × 8,454.25
4. Step 4: Simplify right side
   11,280.24x = 131,525,158.95
5. Step 5: Solve for x
   x = 131,525,158.95/11,280.24
6. Step 6: Final answer
   x = 11,659.78