Finding the Third Proportional to 42,219 and 66,852

Step by Step Solution

1. Step 1: Write the proportion equation
   42,219 : 66,852 = 66,852 : x
2. Step 2: Convert to fraction form
   42,219/66,852 = 66,852/x
3. Step 3: Cross multiply
   42,219x = 66,852 × 66,852
4. Step 4: Simplify right side
   42,219x = 4,469,189,904
5. Step 5: Solve for x
   x = 4,469,189,904/42,219
6. Step 6: Final answer
   x = 105,857.31