Finding the Third Proportional to 18,618 and 42,105

Step by Step Solution

1. Step 1: Write the proportion equation
   18,618 : 42,105 = 42,105 : x
2. Step 2: Convert to fraction form
   18,618/42,105 = 42,105/x
3. Step 3: Cross multiply
   18,618x = 42,105 × 42,105
4. Step 4: Simplify right side
   18,618x = 1,772,831,025
5. Step 5: Solve for x
   x = 1,772,831,025/18,618
6. Step 6: Final answer
   x = 95,221.35