Finding the Fourth Proportional to 2,565.82, 3,540.84 and 1,386.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,565.82 : 3,540.84 = 1,386.89 : x
2. Step 2: Convert to fraction form
   2,565.82/3,540.84 = 1,386.89/x
3. Step 3: Cross multiply
   2,565.82x = 3,540.84 × 1,386.89
4. Step 4: Simplify right side
   2,565.82x = 4,910,752.60
5. Step 5: Solve for x
   x = 4,910,752.60/2,565.82
6. Step 6: Final answer
   x = 1,913.91