Finding the Third Proportional to 42,388 and 67,105

Step by Step Solution

1. Step 1: Write the proportion equation
   42,388 : 67,105 = 67,105 : x
2. Step 2: Convert to fraction form
   42,388/67,105 = 67,105/x
3. Step 3: Cross multiply
   42,388x = 67,105 × 67,105
4. Step 4: Simplify right side
   42,388x = 4,503,081,025
5. Step 5: Solve for x
   x = 4,503,081,025/42,388
6. Step 6: Final answer
   x = 106,234.81