Finding the Third Proportional to 4,003,920 and 8,637,696

Step by Step Solution

1. Step 1: Write the proportion equation
   4,003,920 : 8,637,696 = 8,637,696 : x
2. Step 2: Convert to fraction form
   4,003,920/8,637,696 = 8,637,696/x
3. Step 3: Cross multiply
   4,003,920x = 8,637,696 × 8,637,696
4. Step 4: Simplify right side
   4,003,920x = 74,609,792,188,416
5. Step 5: Solve for x
   x = 74,609,792,188,416/4,003,920
6. Step 6: Final answer
   x = 18,634,186.54