Finding the Third Proportional to 209,256 and 447,240

Step by Step Solution

1. Step 1: Write the proportion equation
   209,256 : 447,240 = 447,240 : x
2. Step 2: Convert to fraction form
   209,256/447,240 = 447,240/x
3. Step 3: Cross multiply
   209,256x = 447,240 × 447,240
4. Step 4: Simplify right side
   209,256x = 200,023,617,600
5. Step 5: Solve for x
   x = 200,023,617,600/209,256
6. Step 6: Final answer
   x = 955,879.96