Finding the Fourth Proportional to 2,264.55, 3,391.35 and 1,287.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,264.55 : 3,391.35 = 1,287.69 : x
2. Step 2: Convert to fraction form
   2,264.55/3,391.35 = 1,287.69/x
3. Step 3: Cross multiply
   2,264.55x = 3,391.35 × 1,287.69
4. Step 4: Simplify right side
   2,264.55x = 4,367,007.48
5. Step 5: Solve for x
   x = 4,367,007.48/2,264.55
6. Step 6: Final answer
   x = 1,928.42