Finding the Third Proportional to 98.72 and 140.48

Step by Step Solution

1. Step 1: Write the proportion equation
   98.72 : 140.48 = 140.48 : x
2. Step 2: Convert to fraction form
   98.72/140.48 = 140.48/x
3. Step 3: Cross multiply
   98.72x = 140.48 × 140.48
4. Step 4: Simplify right side
   98.72x = 19,735.86
5. Step 5: Solve for x
   x = 19,735.86/98.72
6. Step 6: Final answer
   x = 199.92