Finding the Fourth Proportional to 2,105.48, 3,151.70 and 1,644.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.48 : 3,151.70 = 1,644.60 : x
2. Step 2: Convert to fraction form
   2,105.48/3,151.70 = 1,644.60/x
3. Step 3: Cross multiply
   2,105.48x = 3,151.70 × 1,644.60
4. Step 4: Simplify right side
   2,105.48x = 5,183,285.82
5. Step 5: Solve for x
   x = 5,183,285.82/2,105.48
6. Step 6: Final answer
   x = 2,461.81