Finding the Third Proportional to 641,844 and 993,870

Step by Step Solution

1. Step 1: Write the proportion equation
   641,844 : 993,870 = 993,870 : x
2. Step 2: Convert to fraction form
   641,844/993,870 = 993,870/x
3. Step 3: Cross multiply
   641,844x = 993,870 × 993,870
4. Step 4: Simplify right side
   641,844x = 987,777,576,900
5. Step 5: Solve for x
   x = 987,777,576,900/641,844
6. Step 6: Final answer
   x = 1,538,968.31