Finding the Fourth Proportional to 9,646.72, 13,308.24 and 7,404.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,646.72 : 13,308.24 = 7,404.64 : x
2. Step 2: Convert to fraction form
   9,646.72/13,308.24 = 7,404.64/x
3. Step 3: Cross multiply
   9,646.72x = 13,308.24 × 7,404.64
4. Step 4: Simplify right side
   9,646.72x = 98,542,726.23
5. Step 5: Solve for x
   x = 98,542,726.23/9,646.72
6. Step 6: Final answer
   x = 10,215.15