Finding the Fourth Proportional to 2,565.53, 3,540.41 and 1,386.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,565.53 : 3,540.41 = 1,386.59 : x
2. Step 2: Convert to fraction form
   2,565.53/3,540.41 = 1,386.59/x
3. Step 3: Cross multiply
   2,565.53x = 3,540.41 × 1,386.59
4. Step 4: Simplify right side
   2,565.53x = 4,909,099.02
5. Step 5: Solve for x
   x = 4,909,099.02/2,565.53
6. Step 6: Final answer
   x = 1,913.49