Finding the Third Proportional to 17,142 and 18,762

Step by Step Solution

1. Step 1: Write the proportion equation
   17,142 : 18,762 = 18,762 : x
2. Step 2: Convert to fraction form
   17,142/18,762 = 18,762/x
3. Step 3: Cross multiply
   17,142x = 18,762 × 18,762
4. Step 4: Simplify right side
   17,142x = 352,012,644
5. Step 5: Solve for x
   x = 352,012,644/17,142
6. Step 6: Final answer
   x = 20,535.10