Finding the Third Proportional to 168.14 and 399.89

Step by Step Solution

1. Step 1: Write the proportion equation
   168.14 : 399.89 = 399.89 : x
2. Step 2: Convert to fraction form
   168.14/399.89 = 399.89/x
3. Step 3: Cross multiply
   168.14x = 399.89 × 399.89
4. Step 4: Simplify right side
   168.14x = 159,912.51
5. Step 5: Solve for x
   x = 159,912.51/168.14
6. Step 6: Final answer
   x = 951.06