Finding the Fourth Proportional to 2,772.63, 4,159.17 and 872.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.63 : 4,159.17 = 872.83 : x
2. Step 2: Convert to fraction form
   2,772.63/4,159.17 = 872.83/x
3. Step 3: Cross multiply
   2,772.63x = 4,159.17 × 872.83
4. Step 4: Simplify right side
   2,772.63x = 3,630,232.61
5. Step 5: Solve for x
   x = 3,630,232.61/2,772.63
6. Step 6: Final answer
   x = 1,309.31