Finding the Third Proportional to 4,378,339 and 9,581,345

Step by Step Solution

1. Step 1: Write the proportion equation
   4,378,339 : 9,581,345 = 9,581,345 : x
2. Step 2: Convert to fraction form
   4,378,339/9,581,345 = 9,581,345/x
3. Step 3: Cross multiply
   4,378,339x = 9,581,345 × 9,581,345
4. Step 4: Simplify right side
   4,378,339x = 91,802,172,009,025
5. Step 5: Solve for x
   x = 91,802,172,009,025/4,378,339
6. Step 6: Final answer
   x = 20,967,351.32