Finding the Third Proportional to 16,636 and 18,310

Step by Step Solution

1. Step 1: Write the proportion equation
   16,636 : 18,310 = 18,310 : x
2. Step 2: Convert to fraction form
   16,636/18,310 = 18,310/x
3. Step 3: Cross multiply
   16,636x = 18,310 × 18,310
4. Step 4: Simplify right side
   16,636x = 335,256,100
5. Step 5: Solve for x
   x = 335,256,100/16,636
6. Step 6: Final answer
   x = 20,152.45