Finding the Fourth Proportional to 2,429.71, 3,643.63 and 869.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.71 : 3,643.63 = 869.42 : x
2. Step 2: Convert to fraction form
   2,429.71/3,643.63 = 869.42/x
3. Step 3: Cross multiply
   2,429.71x = 3,643.63 × 869.42
4. Step 4: Simplify right side
   2,429.71x = 3,167,844.79
5. Step 5: Solve for x
   x = 3,167,844.79/2,429.71
6. Step 6: Final answer
   x = 1,303.80