Finding the Third Proportional to 67,064 and 139,636

Step by Step Solution

1. Step 1: Write the proportion equation
   67,064 : 139,636 = 139,636 : x
2. Step 2: Convert to fraction form
   67,064/139,636 = 139,636/x
3. Step 3: Cross multiply
   67,064x = 139,636 × 139,636
4. Step 4: Simplify right side
   67,064x = 19,498,212,496
5. Step 5: Solve for x
   x = 19,498,212,496/67,064
6. Step 6: Final answer
   x = 290,740.37