Finding the Fourth Proportional to 2,200.52, 3,301.33 and 640.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.52 : 3,301.33 = 640.54 : x
2. Step 2: Convert to fraction form
   2,200.52/3,301.33 = 640.54/x
3. Step 3: Cross multiply
   2,200.52x = 3,301.33 × 640.54
4. Step 4: Simplify right side
   2,200.52x = 2,114,630.72
5. Step 5: Solve for x
   x = 2,114,630.72/2,200.52
6. Step 6: Final answer
   x = 960.97