Finding the Fourth Proportional to 2,165.15, 2,987.92 and 1,268.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.15 : 2,987.92 = 1,268.69 : x
2. Step 2: Convert to fraction form
   2,165.15/2,987.92 = 1,268.69/x
3. Step 3: Cross multiply
   2,165.15x = 2,987.92 × 1,268.69
4. Step 4: Simplify right side
   2,165.15x = 3,790,744.22
5. Step 5: Solve for x
   x = 3,790,744.22/2,165.15
6. Step 6: Final answer
   x = 1,750.80