Finding the Fourth Proportional to 2,382.31, 3,287.42 and 1,320.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.31 : 3,287.42 = 1,320.06 : x
2. Step 2: Convert to fraction form
   2,382.31/3,287.42 = 1,320.06/x
3. Step 3: Cross multiply
   2,382.31x = 3,287.42 × 1,320.06
4. Step 4: Simplify right side
   2,382.31x = 4,339,585.04
5. Step 5: Solve for x
   x = 4,339,585.04/2,382.31
6. Step 6: Final answer
   x = 1,821.59