Finding the Fourth Proportional to 12,086.74, 16,680.90 and 8,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.74 : 16,680.90 = 8,116.12 : x
2. Step 2: Convert to fraction form
   12,086.74/16,680.90 = 8,116.12/x
3. Step 3: Cross multiply
   12,086.74x = 16,680.90 × 8,116.12
4. Step 4: Simplify right side
   12,086.74x = 135,384,186.11
5. Step 5: Solve for x
   x = 135,384,186.11/12,086.74
6. Step 6: Final answer
   x = 11,201.05