Finding the Third Proportional to 16,856 and 18,260

Step by Step Solution

1. Step 1: Write the proportion equation
   16,856 : 18,260 = 18,260 : x
2. Step 2: Convert to fraction form
   16,856/18,260 = 18,260/x
3. Step 3: Cross multiply
   16,856x = 18,260 × 18,260
4. Step 4: Simplify right side
   16,856x = 333,427,600
5. Step 5: Solve for x
   x = 333,427,600/16,856
6. Step 6: Final answer
   x = 19,780.94