Finding the Third Proportional to 448,536 and 530,456

Step by Step Solution

1. Step 1: Write the proportion equation
   448,536 : 530,456 = 530,456 : x
2. Step 2: Convert to fraction form
   448,536/530,456 = 530,456/x
3. Step 3: Cross multiply
   448,536x = 530,456 × 530,456
4. Step 4: Simplify right side
   448,536x = 281,383,567,936
5. Step 5: Solve for x
   x = 281,383,567,936/448,536
6. Step 6: Final answer
   x = 627,337.76