Finding the Fourth Proportional to 2,382.32, 3,287.81 and 1,387.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.32 : 3,287.81 = 1,387.69 : x
2. Step 2: Convert to fraction form
   2,382.32/3,287.81 = 1,387.69/x
3. Step 3: Cross multiply
   2,382.32x = 3,287.81 × 1,387.69
4. Step 4: Simplify right side
   2,382.32x = 4,562,454.12
5. Step 5: Solve for x
   x = 4,562,454.12/2,382.32
6. Step 6: Final answer
   x = 1,915.13