Finding the Fourth Proportional to 2,565.27, 3,540.07 and 1,386.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,565.27 : 3,540.07 = 1,386.34 : x
2. Step 2: Convert to fraction form
   2,565.27/3,540.07 = 1,386.34/x
3. Step 3: Cross multiply
   2,565.27x = 3,540.07 × 1,386.34
4. Step 4: Simplify right side
   2,565.27x = 4,907,733.71
5. Step 5: Solve for x
   x = 4,907,733.71/2,565.27
6. Step 6: Final answer
   x = 1,913.15