Finding the Third Proportional to 644,220 and 1,455,468

Step by Step Solution

1. Step 1: Write the proportion equation
   644,220 : 1,455,468 = 1,455,468 : x
2. Step 2: Convert to fraction form
   644,220/1,455,468 = 1,455,468/x
3. Step 3: Cross multiply
   644,220x = 1,455,468 × 1,455,468
4. Step 4: Simplify right side
   644,220x = 2,118,387,099,024
5. Step 5: Solve for x
   x = 2,118,387,099,024/644,220
6. Step 6: Final answer
   x = 3,288,297.63