Finding the Fourth Proportional to 8,021.91, 12,034.49 and 2,831.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,021.91 : 12,034.49 = 2,831.43 : x
2. Step 2: Convert to fraction form
   8,021.91/12,034.49 = 2,831.43/x
3. Step 3: Cross multiply
   8,021.91x = 12,034.49 × 2,831.43
4. Step 4: Simplify right side
   8,021.91x = 34,074,801.86
5. Step 5: Solve for x
   x = 34,074,801.86/8,021.91
6. Step 6: Final answer
   x = 4,247.72