Finding the Third Proportional to 78.47 and 168.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78.47 : 168.89 = 168.89 : x
2. Step 2: Convert to fraction form
   78.47/168.89 = 168.89/x
3. Step 3: Cross multiply
   78.47x = 168.89 × 168.89
4. Step 4: Simplify right side
   78.47x = 28,524.04
5. Step 5: Solve for x
   x = 28,524.04/78.47
6. Step 6: Final answer
   x = 363.51