Finding the Fourth Proportional to 2,429.43, 3,641.55 and 1,387.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.43 : 3,641.55 = 1,387.20 : x
2. Step 2: Convert to fraction form
   2,429.43/3,641.55 = 1,387.20/x
3. Step 3: Cross multiply
   2,429.43x = 3,641.55 × 1,387.20
4. Step 4: Simplify right side
   2,429.43x = 5,051,558.16
5. Step 5: Solve for x
   x = 5,051,558.16/2,429.43
6. Step 6: Final answer
   x = 2,079.32