Finding the Fourth Proportional to 2,049.20, 3,066.48 and 1,640.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,049.20 : 3,066.48 = 1,640.96 : x
2. Step 2: Convert to fraction form
   2,049.20/3,066.48 = 1,640.96/x
3. Step 3: Cross multiply
   2,049.20x = 3,066.48 × 1,640.96
4. Step 4: Simplify right side
   2,049.20x = 5,031,971.02
5. Step 5: Solve for x
   x = 5,031,971.02/2,049.20
6. Step 6: Final answer
   x = 2,455.58