Finding the Third Proportional to 67,057 and 139,623

Step by Step Solution

1. Step 1: Write the proportion equation
   67,057 : 139,623 = 139,623 : x
2. Step 2: Convert to fraction form
   67,057/139,623 = 139,623/x
3. Step 3: Cross multiply
   67,057x = 139,623 × 139,623
4. Step 4: Simplify right side
   67,057x = 19,494,582,129
5. Step 5: Solve for x
   x = 19,494,582,129/67,057
6. Step 6: Final answer
   x = 290,716.59