Finding the Fourth Proportional to 6,613.28, 9,906.69 and 3,979.33

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.28 : 9,906.69 = 3,979.33 : x
2. Step 2: Convert to fraction form
   6,613.28/9,906.69 = 3,979.33/x
3. Step 3: Cross multiply
   6,613.28x = 9,906.69 × 3,979.33
4. Step 4: Simplify right side
   6,613.28x = 39,421,988.72
5. Step 5: Solve for x
   x = 39,421,988.72/6,613.28
6. Step 6: Final answer
   x = 5,961.03