Finding the Fourth Proportional to 2,606.61, 3,911.46 and 964.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.61 : 3,911.46 = 964.31 : x
2. Step 2: Convert to fraction form
   2,606.61/3,911.46 = 964.31/x
3. Step 3: Cross multiply
   2,606.61x = 3,911.46 × 964.31
4. Step 4: Simplify right side
   2,606.61x = 3,771,844.96
5. Step 5: Solve for x
   x = 3,771,844.96/2,606.61
6. Step 6: Final answer
   x = 1,447.03