Finding the Third Proportional to 4,067,688 and 8,916,864

Step by Step Solution

1. Step 1: Write the proportion equation
   4,067,688 : 8,916,864 = 8,916,864 : x
2. Step 2: Convert to fraction form
   4,067,688/8,916,864 = 8,916,864/x
3. Step 3: Cross multiply
   4,067,688x = 8,916,864 × 8,916,864
4. Step 4: Simplify right side
   4,067,688x = 79,510,463,594,496
5. Step 5: Solve for x
   x = 79,510,463,594,496/4,067,688
6. Step 6: Final answer
   x = 19,546,844.20