Finding the Fourth Proportional to 7,209.78, 10,814.76 and 2,829.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,209.78 : 10,814.76 = 2,829.30 : x
2. Step 2: Convert to fraction form
   7,209.78/10,814.76 = 2,829.30/x
3. Step 3: Cross multiply
   7,209.78x = 10,814.76 × 2,829.30
4. Step 4: Simplify right side
   7,209.78x = 30,598,200.47
5. Step 5: Solve for x
   x = 30,598,200.47/7,209.78
6. Step 6: Final answer
   x = 4,243.99