Finding the Fourth Proportional to 7,221.78, 10,829.03 and 2,290.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,221.78 : 10,829.03 = 2,290.10 : x
2. Step 2: Convert to fraction form
   7,221.78/10,829.03 = 2,290.10/x
3. Step 3: Cross multiply
   7,221.78x = 10,829.03 × 2,290.10
4. Step 4: Simplify right side
   7,221.78x = 24,799,496.01
5. Step 5: Solve for x
   x = 24,799,496.01/7,221.78
6. Step 6: Final answer
   x = 3,433.99