Finding the Third Proportional to 78.47 and 160.73

Step by Step Solution

1. Step 1: Write the proportion equation
   78.47 : 160.73 = 160.73 : x
2. Step 2: Convert to fraction form
   78.47/160.73 = 160.73/x
3. Step 3: Cross multiply
   78.47x = 160.73 × 160.73
4. Step 4: Simplify right side
   78.47x = 25,835.54
5. Step 5: Solve for x
   x = 25,835.54/78.47
6. Step 6: Final answer
   x = 329.25