Finding the Third Proportional to 139,137 and 300,507

Step by Step Solution

1. Step 1: Write the proportion equation
   139,137 : 300,507 = 300,507 : x
2. Step 2: Convert to fraction form
   139,137/300,507 = 300,507/x
3. Step 3: Cross multiply
   139,137x = 300,507 × 300,507
4. Step 4: Simplify right side
   139,137x = 90,304,457,049
5. Step 5: Solve for x
   x = 90,304,457,049/139,137
6. Step 6: Final answer
   x = 649,032.66