Finding the Fourth Proportional to 2,205.89, 3,044.21 and 1,211.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.89 : 3,044.21 = 1,211.28 : x
2. Step 2: Convert to fraction form
   2,205.89/3,044.21 = 1,211.28/x
3. Step 3: Cross multiply
   2,205.89x = 3,044.21 × 1,211.28
4. Step 4: Simplify right side
   2,205.89x = 3,687,390.69
5. Step 5: Solve for x
   x = 3,687,390.69/2,205.89
6. Step 6: Final answer
   x = 1,671.61