Finding the Third Proportional to 644,064 and 1,515,456

Step by Step Solution

1. Step 1: Write the proportion equation
   644,064 : 1,515,456 = 1,515,456 : x
2. Step 2: Convert to fraction form
   644,064/1,515,456 = 1,515,456/x
3. Step 3: Cross multiply
   644,064x = 1,515,456 × 1,515,456
4. Step 4: Simplify right side
   644,064x = 2,296,606,887,936
5. Step 5: Solve for x
   x = 2,296,606,887,936/644,064
6. Step 6: Final answer
   x = 3,565,805.40