Finding the Third Proportional to 4,311,485 and 9,388,423

Step by Step Solution

1. Step 1: Write the proportion equation
   4,311,485 : 9,388,423 = 9,388,423 : x
2. Step 2: Convert to fraction form
   4,311,485/9,388,423 = 9,388,423/x
3. Step 3: Cross multiply
   4,311,485x = 9,388,423 × 9,388,423
4. Step 4: Simplify right side
   4,311,485x = 88,142,486,426,929
5. Step 5: Solve for x
   x = 88,142,486,426,929/4,311,485
6. Step 6: Final answer
   x = 20,443,649.10