Finding the Fourth Proportional to 2,555.70, 3,831.60 and 1,322.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.70 : 3,831.60 = 1,322.32 : x
2. Step 2: Convert to fraction form
   2,555.70/3,831.60 = 1,322.32/x
3. Step 3: Cross multiply
   2,555.70x = 3,831.60 × 1,322.32
4. Step 4: Simplify right side
   2,555.70x = 5,066,601.31
5. Step 5: Solve for x
   x = 5,066,601.31/2,555.70
6. Step 6: Final answer
   x = 1,982.47