Finding the Third Proportional to 3,954,768 and 8,634,432

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,768 : 8,634,432 = 8,634,432 : x
2. Step 2: Convert to fraction form
   3,954,768/8,634,432 = 8,634,432/x
3. Step 3: Cross multiply
   3,954,768x = 8,634,432 × 8,634,432
4. Step 4: Simplify right side
   3,954,768x = 74,553,415,962,624
5. Step 5: Solve for x
   x = 74,553,415,962,624/3,954,768
6. Step 6: Final answer
   x = 18,851,527.06