Finding the Fourth Proportional to 3,661.20, 5,488.56 and 3,306.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,661.20 : 5,488.56 = 3,306.96 : x
2. Step 2: Convert to fraction form
   3,661.20/5,488.56 = 3,306.96/x
3. Step 3: Cross multiply
   3,661.20x = 5,488.56 × 3,306.96
4. Step 4: Simplify right side
   3,661.20x = 18,150,448.38
5. Step 5: Solve for x
   x = 18,150,448.38/3,661.20
6. Step 6: Final answer
   x = 4,957.51