Finding the Fourth Proportional to 2,550.57, 3,519.74 and 1,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.57 : 3,519.74 = 1,431.50 : x
2. Step 2: Convert to fraction form
   2,550.57/3,519.74 = 1,431.50/x
3. Step 3: Cross multiply
   2,550.57x = 3,519.74 × 1,431.50
4. Step 4: Simplify right side
   2,550.57x = 5,038,483.05
5. Step 5: Solve for x
   x = 5,038,483.05/2,550.57
6. Step 6: Final answer
   x = 1,975.43