Finding the Fourth Proportional to 2,816.52, 4,224.84 and 868.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.52 : 4,224.84 = 868.72 : x
2. Step 2: Convert to fraction form
   2,816.52/4,224.84 = 868.72/x
3. Step 3: Cross multiply
   2,816.52x = 4,224.84 × 868.72
4. Step 4: Simplify right side
   2,816.52x = 3,670,210.31
5. Step 5: Solve for x
   x = 3,670,210.31/2,816.52
6. Step 6: Final answer
   x = 1,303.10