Finding the Fourth Proportional to 3,913.56, 5,361.84 and 3,771.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.56 : 5,361.84 = 3,771.72 : x
2. Step 2: Convert to fraction form
   3,913.56/5,361.84 = 3,771.72/x
3. Step 3: Cross multiply
   3,913.56x = 5,361.84 × 3,771.72
4. Step 4: Simplify right side
   3,913.56x = 20,223,359.16
5. Step 5: Solve for x
   x = 20,223,359.16/3,913.56
6. Step 6: Final answer
   x = 5,167.51