Finding the Fourth Proportional to 2,555.18, 3,830.76 and 1,322.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.18 : 3,830.76 = 1,322.78 : x
2. Step 2: Convert to fraction form
   2,555.18/3,830.76 = 1,322.78/x
3. Step 3: Cross multiply
   2,555.18x = 3,830.76 × 1,322.78
4. Step 4: Simplify right side
   2,555.18x = 5,067,252.71
5. Step 5: Solve for x
   x = 5,067,252.71/2,555.18
6. Step 6: Final answer
   x = 1,983.13