Finding the Fourth Proportional to 2,204.89, 3,306.82 and 644.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,204.89 : 3,306.82 = 644.56 : x
2. Step 2: Convert to fraction form
   2,204.89/3,306.82 = 644.56/x
3. Step 3: Cross multiply
   2,204.89x = 3,306.82 × 644.56
4. Step 4: Simplify right side
   2,204.89x = 2,131,443.90
5. Step 5: Solve for x
   x = 2,131,443.90/2,204.89
6. Step 6: Final answer
   x = 966.69