Finding the Fourth Proportional to 2,429.58, 3,643.46 and 869.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.58 : 3,643.46 = 869.30 : x
2. Step 2: Convert to fraction form
   2,429.58/3,643.46 = 869.30/x
3. Step 3: Cross multiply
   2,429.58x = 3,643.46 × 869.30
4. Step 4: Simplify right side
   2,429.58x = 3,167,237.21
5. Step 5: Solve for x
   x = 3,167,237.21/2,429.58
6. Step 6: Final answer
   x = 1,303.62