Finding the Fourth Proportional to 6,964.38, 9,610.71 and 3,939.47

Step by Step Solution

1. Step 1: Write the proportion equation
   6,964.38 : 9,610.71 = 3,939.47 : x
2. Step 2: Convert to fraction form
   6,964.38/9,610.71 = 3,939.47/x
3. Step 3: Cross multiply
   6,964.38x = 9,610.71 × 3,939.47
4. Step 4: Simplify right side
   6,964.38x = 37,861,055.67
5. Step 5: Solve for x
   x = 37,861,055.67/6,964.38
6. Step 6: Final answer
   x = 5,436.39