Finding the Fourth Proportional to 3,960.65, 5,475.96 and 3,786.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.65 : 5,475.96 = 3,786.38 : x
2. Step 2: Convert to fraction form
   3,960.65/5,475.96 = 3,786.38/x
3. Step 3: Cross multiply
   3,960.65x = 5,475.96 × 3,786.38
4. Step 4: Simplify right side
   3,960.65x = 20,734,038.05
5. Step 5: Solve for x
   x = 20,734,038.05/3,960.65
6. Step 6: Final answer
   x = 5,235.01