Finding the Fourth Proportional to 2,550.49, 3,825.72 and 1,320.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.49 : 3,825.72 = 1,320.31 : x
2. Step 2: Convert to fraction form
   2,550.49/3,825.72 = 1,320.31/x
3. Step 3: Cross multiply
   2,550.49x = 3,825.72 × 1,320.31
4. Step 4: Simplify right side
   2,550.49x = 5,051,136.37
5. Step 5: Solve for x
   x = 5,051,136.37/2,550.49
6. Step 6: Final answer
   x = 1,980.46