Finding the Third Proportional to 621,997 and 1,356,543

Step by Step Solution

1. Step 1: Write the proportion equation
   621,997 : 1,356,543 = 1,356,543 : x
2. Step 2: Convert to fraction form
   621,997/1,356,543 = 1,356,543/x
3. Step 3: Cross multiply
   621,997x = 1,356,543 × 1,356,543
4. Step 4: Simplify right side
   621,997x = 1,840,208,910,849
5. Step 5: Solve for x
   x = 1,840,208,910,849/621,997
6. Step 6: Final answer
   x = 2,958,549.50