Finding the Fourth Proportional to 2,606.72, 3,911.62 and 964.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.72 : 3,911.62 = 964.42 : x
2. Step 2: Convert to fraction form
   2,606.72/3,911.62 = 964.42/x
3. Step 3: Cross multiply
   2,606.72x = 3,911.62 × 964.42
4. Step 4: Simplify right side
   2,606.72x = 3,772,444.56
5. Step 5: Solve for x
   x = 3,772,444.56/2,606.72
6. Step 6: Final answer
   x = 1,447.20