Finding the Fourth Proportional to 2,556.95, 3,831.61 and 1,322.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.95 : 3,831.61 = 1,322.71 : x
2. Step 2: Convert to fraction form
   2,556.95/3,831.61 = 1,322.71/x
3. Step 3: Cross multiply
   2,556.95x = 3,831.61 × 1,322.71
4. Step 4: Simplify right side
   2,556.95x = 5,068,108.86
5. Step 5: Solve for x
   x = 5,068,108.86/2,556.95
6. Step 6: Final answer
   x = 1,982.09