Finding the Fourth Proportional to 2,550.80, 3,520.16 and 1,431.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.80 : 3,520.16 = 1,431.82 : x
2. Step 2: Convert to fraction form
   2,550.80/3,520.16 = 1,431.82/x
3. Step 3: Cross multiply
   2,550.80x = 3,520.16 × 1,431.82
4. Step 4: Simplify right side
   2,550.80x = 5,040,235.49
5. Step 5: Solve for x
   x = 5,040,235.49/2,550.80
6. Step 6: Final answer
   x = 1,975.94