Finding the Third Proportional to 111.50 and 136

Step by Step Solution

1. Step 1: Write the proportion equation
   111.50 : 136 = 136 : x
2. Step 2: Convert to fraction form
   111.50/136 = 136/x
3. Step 3: Cross multiply
   111.50x = 136 × 136
4. Step 4: Simplify right side
   111.50x = 18,496
5. Step 5: Solve for x
   x = 18,496/111.50
6. Step 6: Final answer
   x = 165.88