Finding the Third Proportional to 4,578,676 and 9,954,516

Step by Step Solution

1. Step 1: Write the proportion equation
   4,578,676 : 9,954,516 = 9,954,516 : x
2. Step 2: Convert to fraction form
   4,578,676/9,954,516 = 9,954,516/x
3. Step 3: Cross multiply
   4,578,676x = 9,954,516 × 9,954,516
4. Step 4: Simplify right side
   4,578,676x = 99,092,388,794,256
5. Step 5: Solve for x
   x = 99,092,388,794,256/4,578,676
6. Step 6: Final answer
   x = 21,642,149.13