Finding the Fourth Proportional to 6,940.62, 9,577.56 and 3,956.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,940.62 : 9,577.56 = 3,956.31 : x
2. Step 2: Convert to fraction form
   6,940.62/9,577.56 = 3,956.31/x
3. Step 3: Cross multiply
   6,940.62x = 9,577.56 × 3,956.31
4. Step 4: Simplify right side
   6,940.62x = 37,891,796.40
5. Step 5: Solve for x
   x = 37,891,796.40/6,940.62
6. Step 6: Final answer
   x = 5,459.43