Finding the Fourth Proportional to 2,608.96, 3,913.61 and 965.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.96 : 3,913.61 = 965.47 : x
2. Step 2: Convert to fraction form
   2,608.96/3,913.61 = 965.47/x
3. Step 3: Cross multiply
   2,608.96x = 3,913.61 × 965.47
4. Step 4: Simplify right side
   2,608.96x = 3,778,455.89
5. Step 5: Solve for x
   x = 3,778,455.89/2,608.96
6. Step 6: Final answer
   x = 1,448.26