Finding the Fourth Proportional to 2,428.88, 3,643.52 and 868.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.88 : 3,643.52 = 868.72 : x
2. Step 2: Convert to fraction form
   2,428.88/3,643.52 = 868.72/x
3. Step 3: Cross multiply
   2,428.88x = 3,643.52 × 868.72
4. Step 4: Simplify right side
   2,428.88x = 3,165,198.69
5. Step 5: Solve for x
   x = 3,165,198.69/2,428.88
6. Step 6: Final answer
   x = 1,303.15