Finding the Fourth Proportional to 2,658.72, 3,661.20 and 2,285.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.72 : 3,661.20 = 2,285.22 : x
2. Step 2: Convert to fraction form
   2,658.72/3,661.20 = 2,285.22/x
3. Step 3: Cross multiply
   2,658.72x = 3,661.20 × 2,285.22
4. Step 4: Simplify right side
   2,658.72x = 8,366,647.46
5. Step 5: Solve for x
   x = 8,366,647.46/2,658.72
6. Step 6: Final answer
   x = 3,146.87