Finding the Fourth Proportional to 2,205.72, 3,309.27 and 745.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.72 : 3,309.27 = 745.05 : x
2. Step 2: Convert to fraction form
   2,205.72/3,309.27 = 745.05/x
3. Step 3: Cross multiply
   2,205.72x = 3,309.27 × 745.05
4. Step 4: Simplify right side
   2,205.72x = 2,465,571.61
5. Step 5: Solve for x
   x = 2,465,571.61/2,205.72
6. Step 6: Final answer
   x = 1,117.81