Finding the Fourth Proportional to 3,993.40, 5,997.12 and 3,454.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,993.40 : 5,997.12 = 3,454.48 : x
2. Step 2: Convert to fraction form
   3,993.40/5,997.12 = 3,454.48/x
3. Step 3: Cross multiply
   3,993.40x = 5,997.12 × 3,454.48
4. Step 4: Simplify right side
   3,993.40x = 20,716,931.10
5. Step 5: Solve for x
   x = 20,716,931.10/3,993.40
6. Step 6: Final answer
   x = 5,187.79