Finding the Fourth Proportional to 2,816.38, 4,224.63 and 868.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.38 : 4,224.63 = 868.73 : x
2. Step 2: Convert to fraction form
   2,816.38/4,224.63 = 868.73/x
3. Step 3: Cross multiply
   2,816.38x = 4,224.63 × 868.73
4. Step 4: Simplify right side
   2,816.38x = 3,670,062.82
5. Step 5: Solve for x
   x = 3,670,062.82/2,816.38
6. Step 6: Final answer
   x = 1,303.12