Finding the Fourth Proportional to 2,292.59, 3,436.78 and 831.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,292.59 : 3,436.78 = 831.39 : x
2. Step 2: Convert to fraction form
   2,292.59/3,436.78 = 831.39/x
3. Step 3: Cross multiply
   2,292.59x = 3,436.78 × 831.39
4. Step 4: Simplify right side
   2,292.59x = 2,857,304.52
5. Step 5: Solve for x
   x = 2,857,304.52/2,292.59
6. Step 6: Final answer
   x = 1,246.32