Finding the Third Proportional to 4,405,776 and 9,640,992

Step by Step Solution

1. Step 1: Write the proportion equation
   4,405,776 : 9,640,992 = 9,640,992 : x
2. Step 2: Convert to fraction form
   4,405,776/9,640,992 = 9,640,992/x
3. Step 3: Cross multiply
   4,405,776x = 9,640,992 × 9,640,992
4. Step 4: Simplify right side
   4,405,776x = 92,948,726,744,064
5. Step 5: Solve for x
   x = 92,948,726,744,064/4,405,776
6. Step 6: Final answer
   x = 21,097,016.00