Finding the Third Proportional to 79.73 and 123.40

Step by Step Solution

1. Step 1: Write the proportion equation
   79.73 : 123.40 = 123.40 : x
2. Step 2: Convert to fraction form
   79.73/123.40 = 123.40/x
3. Step 3: Cross multiply
   79.73x = 123.40 × 123.40
4. Step 4: Simplify right side
   79.73x = 15,227.17
5. Step 5: Solve for x
   x = 15,227.17/79.73
6. Step 6: Final answer
   x = 190.97