Finding the Fourth Proportional to 3,964.72, 5,921.04 and 3,185.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.72 : 5,921.04 = 3,185.90 : x
2. Step 2: Convert to fraction form
   3,964.72/5,921.04 = 3,185.90/x
3. Step 3: Cross multiply
   3,964.72x = 5,921.04 × 3,185.90
4. Step 4: Simplify right side
   3,964.72x = 18,863,841.34
5. Step 5: Solve for x
   x = 18,863,841.34/3,964.72
6. Step 6: Final answer
   x = 4,757.93