Finding the Fourth Proportional to 2,096.78, 3,143.63 and 863.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,096.78 : 3,143.63 = 863.75 : x
2. Step 2: Convert to fraction form
   2,096.78/3,143.63 = 863.75/x
3. Step 3: Cross multiply
   2,096.78x = 3,143.63 × 863.75
4. Step 4: Simplify right side
   2,096.78x = 2,715,290.38
5. Step 5: Solve for x
   x = 2,715,290.38/2,096.78
6. Step 6: Final answer
   x = 1,294.98