Finding the Third Proportional to 139.88 and 196.44

Step by Step Solution

1. Step 1: Write the proportion equation
   139.88 : 196.44 = 196.44 : x
2. Step 2: Convert to fraction form
   139.88/196.44 = 196.44/x
3. Step 3: Cross multiply
   139.88x = 196.44 × 196.44
4. Step 4: Simplify right side
   139.88x = 38,587.69
5. Step 5: Solve for x
   x = 38,587.69/139.88
6. Step 6: Final answer
   x = 275.87