Finding the Fourth Proportional to 2,131.34, 3,195.75 and 831.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.34 : 3,195.75 = 831.29 : x
2. Step 2: Convert to fraction form
   2,131.34/3,195.75 = 831.29/x
3. Step 3: Cross multiply
   2,131.34x = 3,195.75 × 831.29
4. Step 4: Simplify right side
   2,131.34x = 2,656,595.02
5. Step 5: Solve for x
   x = 2,656,595.02/2,131.34
6. Step 6: Final answer
   x = 1,246.44