Finding the Fourth Proportional to 5,470.72, 7,549.76 and 3,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470.72 : 7,549.76 = 3,113.20 : x
2. Step 2: Convert to fraction form
   5,470.72/7,549.76 = 3,113.20/x
3. Step 3: Cross multiply
   5,470.72x = 7,549.76 × 3,113.20
4. Step 4: Simplify right side
   5,470.72x = 23,503,912.83
5. Step 5: Solve for x
   x = 23,503,912.83/5,470.72
6. Step 6: Final answer
   x = 4,296.31