Finding the Third Proportional to 5,042 and 10,218

Step by Step Solution

1. Step 1: Write the proportion equation
   5,042 : 10,218 = 10,218 : x
2. Step 2: Convert to fraction form
   5,042/10,218 = 10,218/x
3. Step 3: Cross multiply
   5,042x = 10,218 × 10,218
4. Step 4: Simplify right side
   5,042x = 104,407,524
5. Step 5: Solve for x
   x = 104,407,524/5,042
6. Step 6: Final answer
   x = 20,707.56