Finding the Fourth Proportional to 6,613.83, 9,921.69 and 2,229.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.83 : 9,921.69 = 2,229.78 : x
2. Step 2: Convert to fraction form
   6,613.83/9,921.69 = 2,229.78/x
3. Step 3: Cross multiply
   6,613.83x = 9,921.69 × 2,229.78
4. Step 4: Simplify right side
   6,613.83x = 22,123,185.93
5. Step 5: Solve for x
   x = 22,123,185.93/6,613.83
6. Step 6: Final answer
   x = 3,344.99