Finding the Third Proportional to 4,066,980 and 8,470,812

Step by Step Solution

1. Step 1: Write the proportion equation
   4,066,980 : 8,470,812 = 8,470,812 : x
2. Step 2: Convert to fraction form
   4,066,980/8,470,812 = 8,470,812/x
3. Step 3: Cross multiply
   4,066,980x = 8,470,812 × 8,470,812
4. Step 4: Simplify right side
   4,066,980x = 71,754,655,939,344
5. Step 5: Solve for x
   x = 71,754,655,939,344/4,066,980
6. Step 6: Final answer
   x = 17,643,228.13