Finding the Third Proportional to 221,728 and 486,374

Step by Step Solution

1. Step 1: Write the proportion equation
   221,728 : 486,374 = 486,374 : x
2. Step 2: Convert to fraction form
   221,728/486,374 = 486,374/x
3. Step 3: Cross multiply
   221,728x = 486,374 × 486,374
4. Step 4: Simplify right side
   221,728x = 236,559,667,876
5. Step 5: Solve for x
   x = 236,559,667,876/221,728
6. Step 6: Final answer
   x = 1,066,891.27