Finding the Fourth Proportional to 2,606.78, 3,908.34 and 963.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.78 : 3,908.34 = 963.11 : x
2. Step 2: Convert to fraction form
   2,606.78/3,908.34 = 963.11/x
3. Step 3: Cross multiply
   2,606.78x = 3,908.34 × 963.11
4. Step 4: Simplify right side
   2,606.78x = 3,764,171.11
5. Step 5: Solve for x
   x = 3,764,171.11/2,606.78
6. Step 6: Final answer
   x = 1,443.99