Finding the Third Proportional to 4,311,872 and 9,388,720

Step by Step Solution

1. Step 1: Write the proportion equation
   4,311,872 : 9,388,720 = 9,388,720 : x
2. Step 2: Convert to fraction form
   4,311,872/9,388,720 = 9,388,720/x
3. Step 3: Cross multiply
   4,311,872x = 9,388,720 × 9,388,720
4. Step 4: Simplify right side
   4,311,872x = 88,148,063,238,400
5. Step 5: Solve for x
   x = 88,148,063,238,400/4,311,872
6. Step 6: Final answer
   x = 20,443,107.60