Finding the Fourth Proportional to 9,513.90, 13,132.78 and 8,517.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.90 : 13,132.78 = 8,517.38 : x
2. Step 2: Convert to fraction form
   9,513.90/13,132.78 = 8,517.38/x
3. Step 3: Cross multiply
   9,513.90x = 13,132.78 × 8,517.38
4. Step 4: Simplify right side
   9,513.90x = 111,856,877.72
5. Step 5: Solve for x
   x = 111,856,877.72/9,513.90
6. Step 6: Final answer
   x = 11,757.21