Finding the Third Proportional to 79.69 and 123.66

Step by Step Solution

1. Step 1: Write the proportion equation
   79.69 : 123.66 = 123.66 : x
2. Step 2: Convert to fraction form
   79.69/123.66 = 123.66/x
3. Step 3: Cross multiply
   79.69x = 123.66 × 123.66
4. Step 4: Simplify right side
   79.69x = 15,290.87
5. Step 5: Solve for x
   x = 15,290.87/79.69
6. Step 6: Final answer
   x = 191.89