Finding the Fourth Proportional to 1,649.57, 2,479.44 and 1,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,649.57 : 2,479.44 = 1,105.25 : x
2. Step 2: Convert to fraction form
   1,649.57/2,479.44 = 1,105.25/x
3. Step 3: Cross multiply
   1,649.57x = 2,479.44 × 1,105.25
4. Step 4: Simplify right side
   1,649.57x = 2,740,401.06
5. Step 5: Solve for x
   x = 2,740,401.06/1,649.57
6. Step 6: Final answer
   x = 1,661.28