Finding the Fourth Proportional to 3,956.58, 5,456.97 and 3,691.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,956.58 : 5,456.97 = 3,691.62 : x
2. Step 2: Convert to fraction form
   3,956.58/5,456.97 = 3,691.62/x
3. Step 3: Cross multiply
   3,956.58x = 5,456.97 × 3,691.62
4. Step 4: Simplify right side
   3,956.58x = 20,145,059.59
5. Step 5: Solve for x
   x = 20,145,059.59/3,956.58
6. Step 6: Final answer
   x = 5,091.53