Finding the Third Proportional to 55.69 and 82.69

Step by Step Solution

1. Step 1: Write the proportion equation
   55.69 : 82.69 = 82.69 : x
2. Step 2: Convert to fraction form
   55.69/82.69 = 82.69/x
3. Step 3: Cross multiply
   55.69x = 82.69 × 82.69
4. Step 4: Simplify right side
   55.69x = 6,837.22
5. Step 5: Solve for x
   x = 6,837.22/55.69
6. Step 6: Final answer
   x = 122.78