Finding the Third Proportional to 128.25 and 185.63

Step by Step Solution

1. Step 1: Write the proportion equation
   128.25 : 185.63 = 185.63 : x
2. Step 2: Convert to fraction form
   128.25/185.63 = 185.63/x
3. Step 3: Cross multiply
   128.25x = 185.63 × 185.63
4. Step 4: Simplify right side
   128.25x = 34,456.64
5. Step 5: Solve for x
   x = 34,456.64/128.25
6. Step 6: Final answer
   x = 268.67