Finding the Fourth Proportional to 2,205.23, 3,043.31 and 1,320.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.23 : 3,043.31 = 1,320.86 : x
2. Step 2: Convert to fraction form
   2,205.23/3,043.31 = 1,320.86/x
3. Step 3: Cross multiply
   2,205.23x = 3,043.31 × 1,320.86
4. Step 4: Simplify right side
   2,205.23x = 4,019,786.45
5. Step 5: Solve for x
   x = 4,019,786.45/2,205.23
6. Step 6: Final answer
   x = 1,822.84