Finding the Third Proportional to 221,768 and 475,288

Step by Step Solution

1. Step 1: Write the proportion equation
   221,768 : 475,288 = 475,288 : x
2. Step 2: Convert to fraction form
   221,768/475,288 = 475,288/x
3. Step 3: Cross multiply
   221,768x = 475,288 × 475,288
4. Step 4: Simplify right side
   221,768x = 225,898,682,944
5. Step 5: Solve for x
   x = 225,898,682,944/221,768
6. Step 6: Final answer
   x = 1,018,626.15