Finding the Fourth Proportional to 2,811.27, 4,216.76 and 863.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.27 : 4,216.76 = 863.49 : x
2. Step 2: Convert to fraction form
   2,811.27/4,216.76 = 863.49/x
3. Step 3: Cross multiply
   2,811.27x = 4,216.76 × 863.49
4. Step 4: Simplify right side
   2,811.27x = 3,641,144.83
5. Step 5: Solve for x
   x = 3,641,144.83/2,811.27
6. Step 6: Final answer
   x = 1,295.19