Finding the Third Proportional to 4,311,876 and 9,388,728

Step by Step Solution

1. Step 1: Write the proportion equation
   4,311,876 : 9,388,728 = 9,388,728 : x
2. Step 2: Convert to fraction form
   4,311,876/9,388,728 = 9,388,728/x
3. Step 3: Cross multiply
   4,311,876x = 9,388,728 × 9,388,728
4. Step 4: Simplify right side
   4,311,876x = 88,148,213,457,984
5. Step 5: Solve for x
   x = 88,148,213,457,984/4,311,876
6. Step 6: Final answer
   x = 20,443,123.47