Finding the Third Proportional to 16,984 and 18,520

Step by Step Solution

1. Step 1: Write the proportion equation
   16,984 : 18,520 = 18,520 : x
2. Step 2: Convert to fraction form
   16,984/18,520 = 18,520/x
3. Step 3: Cross multiply
   16,984x = 18,520 × 18,520
4. Step 4: Simplify right side
   16,984x = 342,990,400
5. Step 5: Solve for x
   x = 342,990,400/16,984
6. Step 6: Final answer
   x = 20,194.91