Finding the Fourth Proportional to 2,911.50, 4,367.27 and 831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.50 : 4,367.27 = 831.50 : x
2. Step 2: Convert to fraction form
   2,911.50/4,367.27 = 831.50/x
3. Step 3: Cross multiply
   2,911.50x = 4,367.27 × 831.50
4. Step 4: Simplify right side
   2,911.50x = 3,631,385.01
5. Step 5: Solve for x
   x = 3,631,385.01/2,911.50
6. Step 6: Final answer
   x = 1,247.26