Finding the Third Proportional to 664,640 and 1,441,456

Step by Step Solution

1. Step 1: Write the proportion equation
   664,640 : 1,441,456 = 1,441,456 : x
2. Step 2: Convert to fraction form
   664,640/1,441,456 = 1,441,456/x
3. Step 3: Cross multiply
   664,640x = 1,441,456 × 1,441,456
4. Step 4: Simplify right side
   664,640x = 2,077,795,399,936
5. Step 5: Solve for x
   x = 2,077,795,399,936/664,640
6. Step 6: Final answer
   x = 3,126,196.74