Finding the Fourth Proportional to 3,640.24, 5,022.20 and 2,147.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,640.24 : 5,022.20 = 2,147.61 : x
2. Step 2: Convert to fraction form
   3,640.24/5,022.20 = 2,147.61/x
3. Step 3: Cross multiply
   3,640.24x = 5,022.20 × 2,147.61
4. Step 4: Simplify right side
   3,640.24x = 10,785,751.14
5. Step 5: Solve for x
   x = 10,785,751.14/3,640.24
6. Step 6: Final answer
   x = 2,962.92