Finding the Third Proportional to 4,188,888 and 9,018,972

Step by Step Solution

1. Step 1: Write the proportion equation
   4,188,888 : 9,018,972 = 9,018,972 : x
2. Step 2: Convert to fraction form
   4,188,888/9,018,972 = 9,018,972/x
3. Step 3: Cross multiply
   4,188,888x = 9,018,972 × 9,018,972
4. Step 4: Simplify right side
   4,188,888x = 81,341,855,936,784
5. Step 5: Solve for x
   x = 81,341,855,936,784/4,188,888
6. Step 6: Final answer
   x = 19,418,484.32