Finding the Fourth Proportional to 12,229.50, 16,887.05 and 7,761.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,229.50 : 16,887.05 = 7,761.18 : x
2. Step 2: Convert to fraction form
   12,229.50/16,887.05 = 7,761.18/x
3. Step 3: Cross multiply
   12,229.50x = 16,887.05 × 7,761.18
4. Step 4: Simplify right side
   12,229.50x = 131,063,434.72
5. Step 5: Solve for x
   x = 131,063,434.72/12,229.50
6. Step 6: Final answer
   x = 10,716.99