Finding the Fourth Proportional to 2,550.30, 3,826.59 and 1,089.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.30 : 3,826.59 = 1,089.78 : x
2. Step 2: Convert to fraction form
   2,550.30/3,826.59 = 1,089.78/x
3. Step 3: Cross multiply
   2,550.30x = 3,826.59 × 1,089.78
4. Step 4: Simplify right side
   2,550.30x = 4,170,141.25
5. Step 5: Solve for x
   x = 4,170,141.25/2,550.30
6. Step 6: Final answer
   x = 1,635.16