Finding the Third Proportional to 3,942,345 and 8,553,912

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942,345 : 8,553,912 = 8,553,912 : x
2. Step 2: Convert to fraction form
   3,942,345/8,553,912 = 8,553,912/x
3. Step 3: Cross multiply
   3,942,345x = 8,553,912 × 8,553,912
4. Step 4: Simplify right side
   3,942,345x = 73,169,410,503,744
5. Step 5: Solve for x
   x = 73,169,410,503,744/3,942,345
6. Step 6: Final answer
   x = 18,559,869.95