Finding the Fourth Proportional to 2,562.85, 3,844.88 and 831.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.85 : 3,844.88 = 831.47 : x
2. Step 2: Convert to fraction form
   2,562.85/3,844.88 = 831.47/x
3. Step 3: Cross multiply
   2,562.85x = 3,844.88 × 831.47
4. Step 4: Simplify right side
   2,562.85x = 3,196,907.83
5. Step 5: Solve for x
   x = 3,196,907.83/2,562.85
6. Step 6: Final answer
   x = 1,247.40