Finding the Fourth Proportional to 2,609.30, 3,912.72 and 964.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.30 : 3,912.72 = 964.73 : x
2. Step 2: Convert to fraction form
   2,609.30/3,912.72 = 964.73/x
3. Step 3: Cross multiply
   2,609.30x = 3,912.72 × 964.73
4. Step 4: Simplify right side
   2,609.30x = 3,774,698.80
5. Step 5: Solve for x
   x = 3,774,698.80/2,609.30
6. Step 6: Final answer
   x = 1,446.64