Finding the Fourth Proportional to 2,913.86, 4,371.39 and 965.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,913.86 : 4,371.39 = 965.91 : x
2. Step 2: Convert to fraction form
   2,913.86/4,371.39 = 965.91/x
3. Step 3: Cross multiply
   2,913.86x = 4,371.39 × 965.91
4. Step 4: Simplify right side
   2,913.86x = 4,222,369.31
5. Step 5: Solve for x
   x = 4,222,369.31/2,913.86
6. Step 6: Final answer
   x = 1,449.07