Finding the Third Proportional to 111,448 and 239,456

Step by Step Solution

1. Step 1: Write the proportion equation
   111,448 : 239,456 = 239,456 : x
2. Step 2: Convert to fraction form
   111,448/239,456 = 239,456/x
3. Step 3: Cross multiply
   111,448x = 239,456 × 239,456
4. Step 4: Simplify right side
   111,448x = 57,339,175,936
5. Step 5: Solve for x
   x = 57,339,175,936/111,448
6. Step 6: Final answer
   x = 514,492.64