Finding the Fourth Proportional to 12,456.52, 17,191.20 and 9,307.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.52 : 17,191.20 = 9,307.24 : x
2. Step 2: Convert to fraction form
   12,456.52/17,191.20 = 9,307.24/x
3. Step 3: Cross multiply
   12,456.52x = 17,191.20 × 9,307.24
4. Step 4: Simplify right side
   12,456.52x = 160,002,616.21
5. Step 5: Solve for x
   x = 160,002,616.21/12,456.52
6. Step 6: Final answer
   x = 12,844.89