Finding the Fourth Proportional to 7,218.18, 10,822.89 and 2,830.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,218.18 : 10,822.89 = 2,830.38 : x
2. Step 2: Convert to fraction form
   7,218.18/10,822.89 = 2,830.38/x
3. Step 3: Cross multiply
   7,218.18x = 10,822.89 × 2,830.38
4. Step 4: Simplify right side
   7,218.18x = 30,632,891.40
5. Step 5: Solve for x
   x = 30,632,891.40/7,218.18
6. Step 6: Final answer
   x = 4,243.85