Finding the Fourth Proportional to 2,205.42, 3,043.37 and 1,309.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.42 : 3,043.37 = 1,309.20 : x
2. Step 2: Convert to fraction form
   2,205.42/3,043.37 = 1,309.20/x
3. Step 3: Cross multiply
   2,205.42x = 3,043.37 × 1,309.20
4. Step 4: Simplify right side
   2,205.42x = 3,984,362.05
5. Step 5: Solve for x
   x = 3,984,362.05/2,205.42
6. Step 6: Final answer
   x = 1,806.62