Finding the Fourth Proportional to 2,428.71, 3,642.13 and 868.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.71 : 3,642.13 = 868.42 : x
2. Step 2: Convert to fraction form
   2,428.71/3,642.13 = 868.42/x
3. Step 3: Cross multiply
   2,428.71x = 3,642.13 × 868.42
4. Step 4: Simplify right side
   2,428.71x = 3,162,898.53
5. Step 5: Solve for x
   x = 3,162,898.53/2,428.71
6. Step 6: Final answer
   x = 1,302.30