Finding the Third Proportional to 111.50 and 169.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.50 : 169.25 = 169.25 : x
2. Step 2: Convert to fraction form
   111.50/169.25 = 169.25/x
3. Step 3: Cross multiply
   111.50x = 169.25 × 169.25
4. Step 4: Simplify right side
   111.50x = 28,645.56
5. Step 5: Solve for x
   x = 28,645.56/111.50
6. Step 6: Final answer
   x = 256.91