Finding the Third Proportional to 4,039,058 and 8,645,616

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,058 : 8,645,616 = 8,645,616 : x
2. Step 2: Convert to fraction form
   4,039,058/8,645,616 = 8,645,616/x
3. Step 3: Cross multiply
   4,039,058x = 8,645,616 × 8,645,616
4. Step 4: Simplify right side
   4,039,058x = 74,746,676,019,456
5. Step 5: Solve for x
   x = 74,746,676,019,456/4,039,058
6. Step 6: Final answer
   x = 18,505,967.49