Finding the Third Proportional to 139,079 and 300,330

Step by Step Solution

1. Step 1: Write the proportion equation
   139,079 : 300,330 = 300,330 : x
2. Step 2: Convert to fraction form
   139,079/300,330 = 300,330/x
3. Step 3: Cross multiply
   139,079x = 300,330 × 300,330
4. Step 4: Simplify right side
   139,079x = 90,198,108,900
5. Step 5: Solve for x
   x = 90,198,108,900/139,079
6. Step 6: Final answer
   x = 648,538.66