Finding the Third Proportional to 4,200,891 and 9,161,994

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,891 : 9,161,994 = 9,161,994 : x
2. Step 2: Convert to fraction form
   4,200,891/9,161,994 = 9,161,994/x
3. Step 3: Cross multiply
   4,200,891x = 9,161,994 × 9,161,994
4. Step 4: Simplify right side
   4,200,891x = 83,942,134,056,036
5. Step 5: Solve for x
   x = 83,942,134,056,036/4,200,891
6. Step 6: Final answer
   x = 19,981,983.36