Finding the Fourth Proportional to 5,661.40, 8,495.56 and 3,578.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,661.40 : 8,495.56 = 3,578.54 : x
2. Step 2: Convert to fraction form
   5,661.40/8,495.56 = 3,578.54/x
3. Step 3: Cross multiply
   5,661.40x = 8,495.56 × 3,578.54
4. Step 4: Simplify right side
   5,661.40x = 30,401,640.91
5. Step 5: Solve for x
   x = 30,401,640.91/5,661.40
6. Step 6: Final answer
   x = 5,369.99