Finding the Third Proportional to 64,222 and 139,568

Step by Step Solution

1. Step 1: Write the proportion equation
   64,222 : 139,568 = 139,568 : x
2. Step 2: Convert to fraction form
   64,222/139,568 = 139,568/x
3. Step 3: Cross multiply
   64,222x = 139,568 × 139,568
4. Step 4: Simplify right side
   64,222x = 19,479,226,624
5. Step 5: Solve for x
   x = 19,479,226,624/64,222
6. Step 6: Final answer
   x = 303,310.81