Finding the Fourth Proportional to 2,550.72, 3,519.84 and 1,431.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.72 : 3,519.84 = 1,431.60 : x
2. Step 2: Convert to fraction form
   2,550.72/3,519.84 = 1,431.60/x
3. Step 3: Cross multiply
   2,550.72x = 3,519.84 × 1,431.60
4. Step 4: Simplify right side
   2,550.72x = 5,039,002.94
5. Step 5: Solve for x
   x = 5,039,002.94/2,550.72
6. Step 6: Final answer
   x = 1,975.52