Finding the Third Proportional to 139,096 and 300,320

Step by Step Solution

1. Step 1: Write the proportion equation
   139,096 : 300,320 = 300,320 : x
2. Step 2: Convert to fraction form
   139,096/300,320 = 300,320/x
3. Step 3: Cross multiply
   139,096x = 300,320 × 300,320
4. Step 4: Simplify right side
   139,096x = 90,192,102,400
5. Step 5: Solve for x
   x = 90,192,102,400/139,096
6. Step 6: Final answer
   x = 648,416.22