Finding the Third Proportional to 104.25 and 140.25

Step by Step Solution

1. Step 1: Write the proportion equation
   104.25 : 140.25 = 140.25 : x
2. Step 2: Convert to fraction form
   104.25/140.25 = 140.25/x
3. Step 3: Cross multiply
   104.25x = 140.25 × 140.25
4. Step 4: Simplify right side
   104.25x = 19,670.06
5. Step 5: Solve for x
   x = 19,670.06/104.25
6. Step 6: Final answer
   x = 188.68