Finding the Fourth Proportional to 2,174.72, 3,256 and 1,660.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.72 : 3,256 = 1,660.16 : x
2. Step 2: Convert to fraction form
   2,174.72/3,256 = 1,660.16/x
3. Step 3: Cross multiply
   2,174.72x = 3,256 × 1,660.16
4. Step 4: Simplify right side
   2,174.72x = 5,405,480.96
5. Step 5: Solve for x
   x = 5,405,480.96/2,174.72
6. Step 6: Final answer
   x = 2,485.60