Finding the Fourth Proportional to 12,411.72, 17,128.98 and 7,107.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.72 : 17,128.98 = 7,107.24 : x
2. Step 2: Convert to fraction form
   12,411.72/17,128.98 = 7,107.24/x
3. Step 3: Cross multiply
   12,411.72x = 17,128.98 × 7,107.24
4. Step 4: Simplify right side
   12,411.72x = 121,739,771.82
5. Step 5: Solve for x
   x = 121,739,771.82/12,411.72
6. Step 6: Final answer
   x = 9,808.45