Finding the Third Proportional to 79.88 and 170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79.88 : 170.72 = 170.72 : x
2. Step 2: Convert to fraction form
   79.88/170.72 = 170.72/x
3. Step 3: Cross multiply
   79.88x = 170.72 × 170.72
4. Step 4: Simplify right side
   79.88x = 29,144.89
5. Step 5: Solve for x
   x = 29,144.89/79.88
6. Step 6: Final answer
   x = 364.88