Finding the Third Proportional to 139,120.50 and 196,530

Step by Step Solution

1. Step 1: Write the proportion equation
   139,120.50 : 196,530 = 196,530 : x
2. Step 2: Convert to fraction form
   139,120.50/196,530 = 196,530/x
3. Step 3: Cross multiply
   139,120.50x = 196,530 × 196,530
4. Step 4: Simplify right side
   139,120.50x = 38,624,040,900
5. Step 5: Solve for x
   x = 38,624,040,900/139,120.50
6. Step 6: Final answer
   x = 277,630.12