Finding the Third Proportional to 20,431,072 and 30,469,434

Step by Step Solution

1. Step 1: Write the proportion equation
   20,431,072 : 30,469,434 = 30,469,434 : x
2. Step 2: Convert to fraction form
   20,431,072/30,469,434 = 30,469,434/x
3. Step 3: Cross multiply
   20,431,072x = 30,469,434 × 30,469,434
4. Step 4: Simplify right side
   20,431,072x = 928,386,408,280,356
5. Step 5: Solve for x
   x = 928,386,408,280,356/20,431,072
6. Step 6: Final answer
   x = 45,439,926.42