Finding the Third Proportional to 16,489,644 and 21,683,808

Step by Step Solution

1. Step 1: Write the proportion equation
   16,489,644 : 21,683,808 = 21,683,808 : x
2. Step 2: Convert to fraction form
   16,489,644/21,683,808 = 21,683,808/x
3. Step 3: Cross multiply
   16,489,644x = 21,683,808 × 21,683,808
4. Step 4: Simplify right side
   16,489,644x = 470,187,529,380,864
5. Step 5: Solve for x
   x = 470,187,529,380,864/16,489,644
6. Step 6: Final answer
   x = 28,514,110.39