Finding the Fourth Proportional to 2,559.34, 3,831.06 and 1,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.34 : 3,831.06 = 1,386.42 : x
2. Step 2: Convert to fraction form
   2,559.34/3,831.06 = 1,386.42/x
3. Step 3: Cross multiply
   2,559.34x = 3,831.06 × 1,386.42
4. Step 4: Simplify right side
   2,559.34x = 5,311,469.66
5. Step 5: Solve for x
   x = 5,311,469.66/2,559.34
6. Step 6: Final answer
   x = 2,075.33