Finding the Fourth Proportional to 9,264.85, 12,699.72 and 9,140.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,264.85 : 12,699.72 = 9,140.24 : x
2. Step 2: Convert to fraction form
   9,264.85/12,699.72 = 9,140.24/x
3. Step 3: Cross multiply
   9,264.85x = 12,699.72 × 9,140.24
4. Step 4: Simplify right side
   9,264.85x = 116,078,520.48
5. Step 5: Solve for x
   x = 116,078,520.48/9,264.85
6. Step 6: Final answer
   x = 12,528.92