Finding the Fourth Proportional to 2,205.89, 3,305.18 and 1,382.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.89 : 3,305.18 = 1,382.12 : x
2. Step 2: Convert to fraction form
   2,205.89/3,305.18 = 1,382.12/x
3. Step 3: Cross multiply
   2,205.89x = 3,305.18 × 1,382.12
4. Step 4: Simplify right side
   2,205.89x = 4,568,142.31
5. Step 5: Solve for x
   x = 4,568,142.31/2,205.89
6. Step 6: Final answer
   x = 2,070.89