Finding the Fourth Proportional to 13,443.20, 18,552.04 and 7,475.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.20 : 18,552.04 = 7,475.12 : x
2. Step 2: Convert to fraction form
   13,443.20/18,552.04 = 7,475.12/x
3. Step 3: Cross multiply
   13,443.20x = 18,552.04 × 7,475.12
4. Step 4: Simplify right side
   13,443.20x = 138,678,613.80
5. Step 5: Solve for x
   x = 138,678,613.80/13,443.20
6. Step 6: Final answer
   x = 10,315.90