Finding the Fourth Proportional to 3,578.28, 5,361.56 and 3,441.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.28 : 5,361.56 = 3,441.60 : x
2. Step 2: Convert to fraction form
   3,578.28/5,361.56 = 3,441.60/x
3. Step 3: Cross multiply
   3,578.28x = 5,361.56 × 3,441.60
4. Step 4: Simplify right side
   3,578.28x = 18,452,327.69
5. Step 5: Solve for x
   x = 18,452,327.69/3,578.28
6. Step 6: Final answer
   x = 5,156.76