Finding the Third Proportional to 4,470,514 and 9,718,870

Step by Step Solution

1. Step 1: Write the proportion equation
   4,470,514 : 9,718,870 = 9,718,870 : x
2. Step 2: Convert to fraction form
   4,470,514/9,718,870 = 9,718,870/x
3. Step 3: Cross multiply
   4,470,514x = 9,718,870 × 9,718,870
4. Step 4: Simplify right side
   4,470,514x = 94,456,434,076,900
5. Step 5: Solve for x
   x = 94,456,434,076,900/4,470,514
6. Step 6: Final answer
   x = 21,128,763.73