Finding the Fourth Proportional to 2,550.45, 3,519.69 and 1,431.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.45 : 3,519.69 = 1,431.48 : x
2. Step 2: Convert to fraction form
   2,550.45/3,519.69 = 1,431.48/x
3. Step 3: Cross multiply
   2,550.45x = 3,519.69 × 1,431.48
4. Step 4: Simplify right side
   2,550.45x = 5,038,352.64
5. Step 5: Solve for x
   x = 5,038,352.64/2,550.45
6. Step 6: Final answer
   x = 1,975.47