Finding the Fourth Proportional to 6,940.10, 9,576.69 and 3,956.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,940.10 : 9,576.69 = 3,956.60 : x
2. Step 2: Convert to fraction form
   6,940.10/9,576.69 = 3,956.60/x
3. Step 3: Cross multiply
   6,940.10x = 9,576.69 × 3,956.60
4. Step 4: Simplify right side
   6,940.10x = 37,891,131.65
5. Step 5: Solve for x
   x = 37,891,131.65/6,940.10
6. Step 6: Final answer
   x = 5,459.74