Finding the Fourth Proportional to 2,550.39, 3,519.33 and 1,431.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.39 : 3,519.33 = 1,431.07 : x
2. Step 2: Convert to fraction form
   2,550.39/3,519.33 = 1,431.07/x
3. Step 3: Cross multiply
   2,550.39x = 3,519.33 × 1,431.07
4. Step 4: Simplify right side
   2,550.39x = 5,036,407.58
5. Step 5: Solve for x
   x = 5,036,407.58/2,550.39
6. Step 6: Final answer
   x = 1,974.76