Finding the Fourth Proportional to 2,550.72, 3,518.82 and 1,666.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.72 : 3,518.82 = 1,666.20 : x
2. Step 2: Convert to fraction form
   2,550.72/3,518.82 = 1,666.20/x
3. Step 3: Cross multiply
   2,550.72x = 3,518.82 × 1,666.20
4. Step 4: Simplify right side
   2,550.72x = 5,863,057.88
5. Step 5: Solve for x
   x = 5,863,057.88/2,550.72
6. Step 6: Final answer
   x = 2,298.59