Finding the Fourth Proportional to 2,074.80, 3,108.90 and 1,661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.80 : 3,108.90 = 1,661.76 : x
2. Step 2: Convert to fraction form
   2,074.80/3,108.90 = 1,661.76/x
3. Step 3: Cross multiply
   2,074.80x = 3,108.90 × 1,661.76
4. Step 4: Simplify right side
   2,074.80x = 5,166,245.66
5. Step 5: Solve for x
   x = 5,166,245.66/2,074.80
6. Step 6: Final answer
   x = 2,490.00