Finding the Fourth Proportional to 10,983.52, 15,147.20 and 9,396.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,983.52 : 15,147.20 = 9,396.16 : x
2. Step 2: Convert to fraction form
   10,983.52/15,147.20 = 9,396.16/x
3. Step 3: Cross multiply
   10,983.52x = 15,147.20 × 9,396.16
4. Step 4: Simplify right side
   10,983.52x = 142,325,514.75
5. Step 5: Solve for x
   x = 142,325,514.75/10,983.52
6. Step 6: Final answer
   x = 12,958.10