Finding the Fourth Proportional to 6,665.34, 9,198.21 and 3,640.38

Step by Step Solution

1. Step 1: Write the proportion equation
   6,665.34 : 9,198.21 = 3,640.38 : x
2. Step 2: Convert to fraction form
   6,665.34/9,198.21 = 3,640.38/x
3. Step 3: Cross multiply
   6,665.34x = 9,198.21 × 3,640.38
4. Step 4: Simplify right side
   6,665.34x = 33,484,979.72
5. Step 5: Solve for x
   x = 33,484,979.72/6,665.34
6. Step 6: Final answer
   x = 5,023.75