Finding the Fourth Proportional to 12,086.80, 16,687.91 and 9,249.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.80 : 16,687.91 = 9,249.12 : x
2. Step 2: Convert to fraction form
   12,086.80/16,687.91 = 9,249.12/x
3. Step 3: Cross multiply
   12,086.80x = 16,687.91 × 9,249.12
4. Step 4: Simplify right side
   12,086.80x = 154,348,505.26
5. Step 5: Solve for x
   x = 154,348,505.26/12,086.80
6. Step 6: Final answer
   x = 12,770.01