Finding the Fourth Proportional to 2,608.72, 3,911.15 and 964.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.72 : 3,911.15 = 964.96 : x
2. Step 2: Convert to fraction form
   2,608.72/3,911.15 = 964.96/x
3. Step 3: Cross multiply
   2,608.72x = 3,911.15 × 964.96
4. Step 4: Simplify right side
   2,608.72x = 3,774,098.48
5. Step 5: Solve for x
   x = 3,774,098.48/2,608.72
6. Step 6: Final answer
   x = 1,446.72