Finding the Third Proportional to 128.67 and 204.82

Step by Step Solution

1. Step 1: Write the proportion equation
   128.67 : 204.82 = 204.82 : x
2. Step 2: Convert to fraction form
   128.67/204.82 = 204.82/x
3. Step 3: Cross multiply
   128.67x = 204.82 × 204.82
4. Step 4: Simplify right side
   128.67x = 41,951.36
5. Step 5: Solve for x
   x = 41,951.36/128.67
6. Step 6: Final answer
   x = 326.03