Finding the Fourth Proportional to 2,429.87, 3,644.42 and 869.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.87 : 3,644.42 = 869.61 : x
2. Step 2: Convert to fraction form
   2,429.87/3,644.42 = 869.61/x
3. Step 3: Cross multiply
   2,429.87x = 3,644.42 × 869.61
4. Step 4: Simplify right side
   2,429.87x = 3,169,225.59
5. Step 5: Solve for x
   x = 3,169,225.59/2,429.87
6. Step 6: Final answer
   x = 1,304.28