Finding the Fourth Proportional to 3,995.28, 5,987.79 and 3,500.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,995.28 : 5,987.79 = 3,500.55 : x
2. Step 2: Convert to fraction form
   3,995.28/5,987.79 = 3,500.55/x
3. Step 3: Cross multiply
   3,995.28x = 5,987.79 × 3,500.55
4. Step 4: Simplify right side
   3,995.28x = 20,960,558.28
5. Step 5: Solve for x
   x = 20,960,558.28/3,995.28
6. Step 6: Final answer
   x = 5,246.33