Finding the Third Proportional to 4,578,849 and 9,042,456

Step by Step Solution

1. Step 1: Write the proportion equation
   4,578,849 : 9,042,456 = 9,042,456 : x
2. Step 2: Convert to fraction form
   4,578,849/9,042,456 = 9,042,456/x
3. Step 3: Cross multiply
   4,578,849x = 9,042,456 × 9,042,456
4. Step 4: Simplify right side
   4,578,849x = 81,766,010,511,936
5. Step 5: Solve for x
   x = 81,766,010,511,936/4,578,849
6. Step 6: Final answer
   x = 17,857,328.45