Finding the Third Proportional to 92.45 and 128.54

Step by Step Solution

1. Step 1: Write the proportion equation
   92.45 : 128.54 = 128.54 : x
2. Step 2: Convert to fraction form
   92.45/128.54 = 128.54/x
3. Step 3: Cross multiply
   92.45x = 128.54 × 128.54
4. Step 4: Simplify right side
   92.45x = 16,523.29
5. Step 5: Solve for x
   x = 16,523.29/92.45
6. Step 6: Final answer
   x = 178.73