Finding the Fourth Proportional to 12,713.20, 17,550.42 and 8,466.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,713.20 : 17,550.42 = 8,466.79 : x
2. Step 2: Convert to fraction form
   12,713.20/17,550.42 = 8,466.79/x
3. Step 3: Cross multiply
   12,713.20x = 17,550.42 × 8,466.79
4. Step 4: Simplify right side
   12,713.20x = 148,595,720.55
5. Step 5: Solve for x
   x = 148,595,720.55/12,713.20
6. Step 6: Final answer
   x = 11,688.30