Finding the Third Proportional to 3,954,672 and 8,634,240

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,672 : 8,634,240 = 8,634,240 : x
2. Step 2: Convert to fraction form
   3,954,672/8,634,240 = 8,634,240/x
3. Step 3: Cross multiply
   3,954,672x = 8,634,240 × 8,634,240
4. Step 4: Simplify right side
   3,954,672x = 74,550,100,377,600
5. Step 5: Solve for x
   x = 74,550,100,377,600/3,954,672
6. Step 6: Final answer
   x = 18,851,146.28