Finding the Third Proportional to 5,072,329 and 10,321,805

Step by Step Solution

1. Step 1: Write the proportion equation
   5,072,329 : 10,321,805 = 10,321,805 : x
2. Step 2: Convert to fraction form
   5,072,329/10,321,805 = 10,321,805/x
3. Step 3: Cross multiply
   5,072,329x = 10,321,805 × 10,321,805
4. Step 4: Simplify right side
   5,072,329x = 106,539,658,458,025
5. Step 5: Solve for x
   x = 106,539,658,458,025/5,072,329
6. Step 6: Final answer
   x = 21,004,090.72