Finding the Fourth Proportional to 2,292.72, 3,438.20 and 831.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,292.72 : 3,438.20 = 831.52 : x
2. Step 2: Convert to fraction form
   2,292.72/3,438.20 = 831.52/x
3. Step 3: Cross multiply
   2,292.72x = 3,438.20 × 831.52
4. Step 4: Simplify right side
   2,292.72x = 2,858,932.06
5. Step 5: Solve for x
   x = 2,858,932.06/2,292.72
6. Step 6: Final answer
   x = 1,246.96