Finding the Third Proportional to 3,954,772 and 8,634,440

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,772 : 8,634,440 = 8,634,440 : x
2. Step 2: Convert to fraction form
   3,954,772/8,634,440 = 8,634,440/x
3. Step 3: Cross multiply
   3,954,772x = 8,634,440 × 8,634,440
4. Step 4: Simplify right side
   3,954,772x = 74,553,554,113,600
5. Step 5: Solve for x
   x = 74,553,554,113,600/3,954,772
6. Step 6: Final answer
   x = 18,851,542.92