Finding the Fourth Proportional to 2,218.01, 3,327.59 and 831.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.01 : 3,327.59 = 831.46 : x
2. Step 2: Convert to fraction form
   2,218.01/3,327.59 = 831.46/x
3. Step 3: Cross multiply
   2,218.01x = 3,327.59 × 831.46
4. Step 4: Simplify right side
   2,218.01x = 2,766,757.98
5. Step 5: Solve for x
   x = 2,766,757.98/2,218.01
6. Step 6: Final answer
   x = 1,247.41