Finding the Third Proportional to 140,568 and 309,936

Step by Step Solution

1. Step 1: Write the proportion equation
   140,568 : 309,936 = 309,936 : x
2. Step 2: Convert to fraction form
   140,568/309,936 = 309,936/x
3. Step 3: Cross multiply
   140,568x = 309,936 × 309,936
4. Step 4: Simplify right side
   140,568x = 96,060,324,096
5. Step 5: Solve for x
   x = 96,060,324,096/140,568
6. Step 6: Final answer
   x = 683,372.63