Finding the Third Proportional to 410,980.50 and 644,868

Step by Step Solution

1. Step 1: Write the proportion equation
   410,980.50 : 644,868 = 644,868 : x
2. Step 2: Convert to fraction form
   410,980.50/644,868 = 644,868/x
3. Step 3: Cross multiply
   410,980.50x = 644,868 × 644,868
4. Step 4: Simplify right side
   410,980.50x = 415,854,737,424
5. Step 5: Solve for x
   x = 415,854,737,424/410,980.50
6. Step 6: Final answer
   x = 1,011,860.02