Finding the Fourth Proportional to 2,382.10, 3,287.35 and 1,387.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.10 : 3,287.35 = 1,387.47 : x
2. Step 2: Convert to fraction form
   2,382.10/3,287.35 = 1,387.47/x
3. Step 3: Cross multiply
   2,382.10x = 3,287.35 × 1,387.47
4. Step 4: Simplify right side
   2,382.10x = 4,561,099.50
5. Step 5: Solve for x
   x = 4,561,099.50/2,382.10
6. Step 6: Final answer
   x = 1,914.74