Finding the Fourth Proportional to 2,429.87, 3,643.55 and 869.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.87 : 3,643.55 = 869.27 : x
2. Step 2: Convert to fraction form
   2,429.87/3,643.55 = 869.27/x
3. Step 3: Cross multiply
   2,429.87x = 3,643.55 × 869.27
4. Step 4: Simplify right side
   2,429.87x = 3,167,224.36
5. Step 5: Solve for x
   x = 3,167,224.36/2,429.87
6. Step 6: Final answer
   x = 1,303.45