Finding the Fourth Proportional to 2,096.55, 3,144.15 and 864

Step by Step Solution

1. Step 1: Write the proportion equation
   2,096.55 : 3,144.15 = 864 : x
2. Step 2: Convert to fraction form
   2,096.55/3,144.15 = 864/x
3. Step 3: Cross multiply
   2,096.55x = 3,144.15 × 864
4. Step 4: Simplify right side
   2,096.55x = 2,716,545.60
5. Step 5: Solve for x
   x = 2,716,545.60/2,096.55
6. Step 6: Final answer
   x = 1,295.72