Finding the Fourth Proportional to 2,428.83, 3,642.32 and 868.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.83 : 3,642.32 = 868.55 : x
2. Step 2: Convert to fraction form
   2,428.83/3,642.32 = 868.55/x
3. Step 3: Cross multiply
   2,428.83x = 3,642.32 × 868.55
4. Step 4: Simplify right side
   2,428.83x = 3,163,518.82
5. Step 5: Solve for x
   x = 3,163,518.82/2,428.83
6. Step 6: Final answer
   x = 1,302.49