Finding the Fourth Proportional to 2,550.42, 3,519.15 and 1,431.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.42 : 3,519.15 = 1,431.33 : x
2. Step 2: Convert to fraction form
   2,550.42/3,519.15 = 1,431.33/x
3. Step 3: Cross multiply
   2,550.42x = 3,519.15 × 1,431.33
4. Step 4: Simplify right side
   2,550.42x = 5,037,064.97
5. Step 5: Solve for x
   x = 5,037,064.97/2,550.42
6. Step 6: Final answer
   x = 1,974.99