Finding the Third Proportional to 123.38 and 140.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123.38 : 140.25 = 140.25 : x
2. Step 2: Convert to fraction form
   123.38/140.25 = 140.25/x
3. Step 3: Cross multiply
   123.38x = 140.25 × 140.25
4. Step 4: Simplify right side
   123.38x = 19,670.06
5. Step 5: Solve for x
   x = 19,670.06/123.38
6. Step 6: Final answer
   x = 159.43