Finding the Third Proportional to 42,724 and 67,018

Step by Step Solution

1. Step 1: Write the proportion equation
   42,724 : 67,018 = 67,018 : x
2. Step 2: Convert to fraction form
   42,724/67,018 = 67,018/x
3. Step 3: Cross multiply
   42,724x = 67,018 × 67,018
4. Step 4: Simplify right side
   42,724x = 4,491,412,324
5. Step 5: Solve for x
   x = 4,491,412,324/42,724
6. Step 6: Final answer
   x = 105,126.21