Finding the Fourth Proportional to 2,598.72, 3,898.89 and 868.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,598.72 : 3,898.89 = 868.56 : x
2. Step 2: Convert to fraction form
   2,598.72/3,898.89 = 868.56/x
3. Step 3: Cross multiply
   2,598.72x = 3,898.89 × 868.56
4. Step 4: Simplify right side
   2,598.72x = 3,386,419.90
5. Step 5: Solve for x
   x = 3,386,419.90/2,598.72
6. Step 6: Final answer
   x = 1,303.11