Finding the Third Proportional to 4,066,989 and 8,470,830

Step by Step Solution

1. Step 1: Write the proportion equation
   4,066,989 : 8,470,830 = 8,470,830 : x
2. Step 2: Convert to fraction form
   4,066,989/8,470,830 = 8,470,830/x
3. Step 3: Cross multiply
   4,066,989x = 8,470,830 × 8,470,830
4. Step 4: Simplify right side
   4,066,989x = 71,754,960,888,900
5. Step 5: Solve for x
   x = 71,754,960,888,900/4,066,989
6. Step 6: Final answer
   x = 17,643,264.07