Finding the Fourth Proportional to 3,678.96, 5,479.50 and 3,661.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.96 : 5,479.50 = 3,661.04 : x
2. Step 2: Convert to fraction form
   3,678.96/5,479.50 = 3,661.04/x
3. Step 3: Cross multiply
   3,678.96x = 5,479.50 × 3,661.04
4. Step 4: Simplify right side
   3,678.96x = 20,060,668.68
5. Step 5: Solve for x
   x = 20,060,668.68/3,678.96
6. Step 6: Final answer
   x = 5,452.81