Finding the Fourth Proportional to 2,550.07, 3,518.20 and 1,665.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.07 : 3,518.20 = 1,665.55 : x
2. Step 2: Convert to fraction form
   2,550.07/3,518.20 = 1,665.55/x
3. Step 3: Cross multiply
   2,550.07x = 3,518.20 × 1,665.55
4. Step 4: Simplify right side
   2,550.07x = 5,859,738.01
5. Step 5: Solve for x
   x = 5,859,738.01/2,550.07
6. Step 6: Final answer
   x = 2,297.87