Finding the Fourth Proportional to 3,993.50, 5,992.68 and 1,685

Step by Step Solution

1. Step 1: Write the proportion equation
   3,993.50 : 5,992.68 = 1,685 : x
2. Step 2: Convert to fraction form
   3,993.50/5,992.68 = 1,685/x
3. Step 3: Cross multiply
   3,993.50x = 5,992.68 × 1,685
4. Step 4: Simplify right side
   3,993.50x = 10,097,665.80
5. Step 5: Solve for x
   x = 10,097,665.80/3,993.50
6. Step 6: Final answer
   x = 2,528.53