Finding the Fourth Proportional to 2,096.31, 3,142.98 and 863.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,096.31 : 3,142.98 = 863.40 : x
2. Step 2: Convert to fraction form
   2,096.31/3,142.98 = 863.40/x
3. Step 3: Cross multiply
   2,096.31x = 3,142.98 × 863.40
4. Step 4: Simplify right side
   2,096.31x = 2,713,648.93
5. Step 5: Solve for x
   x = 2,713,648.93/2,096.31
6. Step 6: Final answer
   x = 1,294.49