Finding the Fourth Proportional to 10,882.62, 16,311.78 and 8,280.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,882.62 : 16,311.78 = 8,280.18 : x
2. Step 2: Convert to fraction form
   10,882.62/16,311.78 = 8,280.18/x
3. Step 3: Cross multiply
   10,882.62x = 16,311.78 × 8,280.18
4. Step 4: Simplify right side
   10,882.62x = 135,064,474.52
5. Step 5: Solve for x
   x = 135,064,474.52/10,882.62
6. Step 6: Final answer
   x = 12,411.03