Finding the Fourth Proportional to 2,474.56, 3,711.92 and 831.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,474.56 : 3,711.92 = 831.12 : x
2. Step 2: Convert to fraction form
   2,474.56/3,711.92 = 831.12/x
3. Step 3: Cross multiply
   2,474.56x = 3,711.92 × 831.12
4. Step 4: Simplify right side
   2,474.56x = 3,085,050.95
5. Step 5: Solve for x
   x = 3,085,050.95/2,474.56
6. Step 6: Final answer
   x = 1,246.71