Finding the Fourth Proportional to 2,555.59, 3,831.30 and 1,323.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.59 : 3,831.30 = 1,323.36 : x
2. Step 2: Convert to fraction form
   2,555.59/3,831.30 = 1,323.36/x
3. Step 3: Cross multiply
   2,555.59x = 3,831.30 × 1,323.36
4. Step 4: Simplify right side
   2,555.59x = 5,070,189.17
5. Step 5: Solve for x
   x = 5,070,189.17/2,555.59
6. Step 6: Final answer
   x = 1,983.96