Finding the Fourth Proportional to 11,380.48, 17,131.12 and 8,116.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,380.48 : 17,131.12 = 8,116.16 : x
2. Step 2: Convert to fraction form
   11,380.48/17,131.12 = 8,116.16/x
3. Step 3: Cross multiply
   11,380.48x = 17,131.12 × 8,116.16
4. Step 4: Simplify right side
   11,380.48x = 139,038,910.90
5. Step 5: Solve for x
   x = 139,038,910.90/11,380.48
6. Step 6: Final answer
   x = 12,217.32