Finding the Third Proportional to 3,421,719 and 7,348,878

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421,719 : 7,348,878 = 7,348,878 : x
2. Step 2: Convert to fraction form
   3,421,719/7,348,878 = 7,348,878/x
3. Step 3: Cross multiply
   3,421,719x = 7,348,878 × 7,348,878
4. Step 4: Simplify right side
   3,421,719x = 54,006,007,858,884
5. Step 5: Solve for x
   x = 54,006,007,858,884/3,421,719
6. Step 6: Final answer
   x = 15,783,297.18