Finding the Fourth Proportional to 2,382.51, 3,287.77 and 1,387.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.51 : 3,287.77 = 1,387.79 : x
2. Step 2: Convert to fraction form
   2,382.51/3,287.77 = 1,387.79/x
3. Step 3: Cross multiply
   2,382.51x = 3,287.77 × 1,387.79
4. Step 4: Simplify right side
   2,382.51x = 4,562,714.42
5. Step 5: Solve for x
   x = 4,562,714.42/2,382.51
6. Step 6: Final answer
   x = 1,915.09