Finding the Fourth Proportional to 7,200.36, 10,800.18 and 2,818.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.36 : 10,800.18 = 2,818.62 : x
2. Step 2: Convert to fraction form
   7,200.36/10,800.18 = 2,818.62/x
3. Step 3: Cross multiply
   7,200.36x = 10,800.18 × 2,818.62
4. Step 4: Simplify right side
   7,200.36x = 30,441,603.35
5. Step 5: Solve for x
   x = 30,441,603.35/7,200.36
6. Step 6: Final answer
   x = 4,227.79