Finding the Fourth Proportional to 2,913.20, 4,369.89 and 965.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,913.20 : 4,369.89 = 965.34 : x
2. Step 2: Convert to fraction form
   2,913.20/4,369.89 = 965.34/x
3. Step 3: Cross multiply
   2,913.20x = 4,369.89 × 965.34
4. Step 4: Simplify right side
   2,913.20x = 4,218,429.61
5. Step 5: Solve for x
   x = 4,218,429.61/2,913.20
6. Step 6: Final answer
   x = 1,448.04