Finding the Fourth Proportional to 2,165.31, 3,253.17 and 1,386.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.31 : 3,253.17 = 1,386.82 : x
2. Step 2: Convert to fraction form
   2,165.31/3,253.17 = 1,386.82/x
3. Step 3: Cross multiply
   2,165.31x = 3,253.17 × 1,386.82
4. Step 4: Simplify right side
   2,165.31x = 4,511,568.79
5. Step 5: Solve for x
   x = 4,511,568.79/2,165.31
6. Step 6: Final answer
   x = 2,083.57