Finding the Third Proportional to 3,948 and 8,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948 : 8,434.50 = 8,434.50 : x
2. Step 2: Convert to fraction form
   3,948/8,434.50 = 8,434.50/x
3. Step 3: Cross multiply
   3,948x = 8,434.50 × 8,434.50
4. Step 4: Simplify right side
   3,948x = 71,140,790.25
5. Step 5: Solve for x
   x = 71,140,790.25/3,948
6. Step 6: Final answer
   x = 18,019.45