Finding the Fourth Proportional to 3,958.71, 5,459.40 and 3,399

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.71 : 5,459.40 = 3,399 : x
2. Step 2: Convert to fraction form
   3,958.71/5,459.40 = 3,399/x
3. Step 3: Cross multiply
   3,958.71x = 5,459.40 × 3,399
4. Step 4: Simplify right side
   3,958.71x = 18,556,500.60
5. Step 5: Solve for x
   x = 18,556,500.60/3,958.71
6. Step 6: Final answer
   x = 4,687.51