Finding the Fourth Proportional to 2,474.50, 3,711.98 and 831.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,474.50 : 3,711.98 = 831.15 : x
2. Step 2: Convert to fraction form
   2,474.50/3,711.98 = 831.15/x
3. Step 3: Cross multiply
   2,474.50x = 3,711.98 × 831.15
4. Step 4: Simplify right side
   2,474.50x = 3,085,212.18
5. Step 5: Solve for x
   x = 3,085,212.18/2,474.50
6. Step 6: Final answer
   x = 1,246.80