Finding the Fourth Proportional to 2,382.27, 3,574.42 and 1,287.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.27 : 3,574.42 = 1,287.40 : x
2. Step 2: Convert to fraction form
   2,382.27/3,574.42 = 1,287.40/x
3. Step 3: Cross multiply
   2,382.27x = 3,574.42 × 1,287.40
4. Step 4: Simplify right side
   2,382.27x = 4,601,710.10
5. Step 5: Solve for x
   x = 4,601,710.10/2,382.27
6. Step 6: Final answer
   x = 1,931.65