Finding the Fourth Proportional to 3,984.69, 5,479.20 and 3,541.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.69 : 5,479.20 = 3,541.80 : x
2. Step 2: Convert to fraction form
   3,984.69/5,479.20 = 3,541.80/x
3. Step 3: Cross multiply
   3,984.69x = 5,479.20 × 3,541.80
4. Step 4: Simplify right side
   3,984.69x = 19,406,230.56
5. Step 5: Solve for x
   x = 19,406,230.56/3,984.69
6. Step 6: Final answer
   x = 4,870.20