Finding the Fourth Proportional to 3,424.56, 5,139.72 and 3,208.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,424.56 : 5,139.72 = 3,208.56 : x
2. Step 2: Convert to fraction form
   3,424.56/5,139.72 = 3,208.56/x
3. Step 3: Cross multiply
   3,424.56x = 5,139.72 × 3,208.56
4. Step 4: Simplify right side
   3,424.56x = 16,491,100.00
5. Step 5: Solve for x
   x = 16,491,100.00/3,424.56
6. Step 6: Final answer
   x = 4,815.54