Finding the Fourth Proportional to 12,663.20, 17,469.41 and 7,357.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,663.20 : 17,469.41 = 7,357.02 : x
2. Step 2: Convert to fraction form
   12,663.20/17,469.41 = 7,357.02/x
3. Step 3: Cross multiply
   12,663.20x = 17,469.41 × 7,357.02
4. Step 4: Simplify right side
   12,663.20x = 128,522,761.97
5. Step 5: Solve for x
   x = 128,522,761.97/12,663.20
6. Step 6: Final answer
   x = 10,149.32