Finding the Fourth Proportional to 2,721.29, 4,082.54 and 872.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,721.29 : 4,082.54 = 872.56 : x
2. Step 2: Convert to fraction form
   2,721.29/4,082.54 = 872.56/x
3. Step 3: Cross multiply
   2,721.29x = 4,082.54 × 872.56
4. Step 4: Simplify right side
   2,721.29x = 3,562,261.10
5. Step 5: Solve for x
   x = 3,562,261.10/2,721.29
6. Step 6: Final answer
   x = 1,309.03