Finding the Fourth Proportional to 12,581.43, 17,366.23 and 8,105.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,581.43 : 17,366.23 = 8,105.16 : x
2. Step 2: Convert to fraction form
   12,581.43/17,366.23 = 8,105.16/x
3. Step 3: Cross multiply
   12,581.43x = 17,366.23 × 8,105.16
4. Step 4: Simplify right side
   12,581.43x = 140,756,072.75
5. Step 5: Solve for x
   x = 140,756,072.75/12,581.43
6. Step 6: Final answer
   x = 11,187.61