Finding the Fourth Proportional to 3,921.50, 5,399.69 and 3,608.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.50 : 5,399.69 = 3,608.03 : x
2. Step 2: Convert to fraction form
   3,921.50/5,399.69 = 3,608.03/x
3. Step 3: Cross multiply
   3,921.50x = 5,399.69 × 3,608.03
4. Step 4: Simplify right side
   3,921.50x = 19,482,198.47
5. Step 5: Solve for x
   x = 19,482,198.47/3,921.50
6. Step 6: Final answer
   x = 4,968.05