Finding the Fourth Proportional to 12,617.79, 17,411.72 and 7,311.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,617.79 : 17,411.72 = 7,311.66 : x
2. Step 2: Convert to fraction form
   12,617.79/17,411.72 = 7,311.66/x
3. Step 3: Cross multiply
   12,617.79x = 17,411.72 × 7,311.66
4. Step 4: Simplify right side
   12,617.79x = 127,308,540.10
5. Step 5: Solve for x
   x = 127,308,540.10/12,617.79
6. Step 6: Final answer
   x = 10,089.61