Finding the Fourth Proportional to 7,200.18, 9,936.90 and 4,217.04

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.18 : 9,936.90 = 4,217.04 : x
2. Step 2: Convert to fraction form
   7,200.18/9,936.90 = 4,217.04/x
3. Step 3: Cross multiply
   7,200.18x = 9,936.90 × 4,217.04
4. Step 4: Simplify right side
   7,200.18x = 41,904,304.78
5. Step 5: Solve for x
   x = 41,904,304.78/7,200.18
6. Step 6: Final answer
   x = 5,819.90