Finding the Fourth Proportional to 9,565.56, 13,200.70 and 5,739.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,565.56 : 13,200.70 = 5,739.12 : x
2. Step 2: Convert to fraction form
   9,565.56/13,200.70 = 5,739.12/x
3. Step 3: Cross multiply
   9,565.56x = 13,200.70 × 5,739.12
4. Step 4: Simplify right side
   9,565.56x = 75,760,401.38
5. Step 5: Solve for x
   x = 75,760,401.38/9,565.56
6. Step 6: Final answer
   x = 7,920.12