Finding the Fourth Proportional to 2,607.72, 3,913.12 and 965.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.72 : 3,913.12 = 965.42 : x
2. Step 2: Convert to fraction form
   2,607.72/3,913.12 = 965.42/x
3. Step 3: Cross multiply
   2,607.72x = 3,913.12 × 965.42
4. Step 4: Simplify right side
   2,607.72x = 3,777,804.31
5. Step 5: Solve for x
   x = 3,777,804.31/2,607.72
6. Step 6: Final answer
   x = 1,448.70