Finding the Third Proportional to 78.47 and 167.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78.47 : 167.70 = 167.70 : x
2. Step 2: Convert to fraction form
   78.47/167.70 = 167.70/x
3. Step 3: Cross multiply
   78.47x = 167.70 × 167.70
4. Step 4: Simplify right side
   78.47x = 28,121.72
5. Step 5: Solve for x
   x = 28,121.72/78.47
6. Step 6: Final answer
   x = 358.38