Finding the Third Proportional to 221,378 and 479,448

Step by Step Solution

1. Step 1: Write the proportion equation
   221,378 : 479,448 = 479,448 : x
2. Step 2: Convert to fraction form
   221,378/479,448 = 479,448/x
3. Step 3: Cross multiply
   221,378x = 479,448 × 479,448
4. Step 4: Simplify right side
   221,378x = 229,870,384,704
5. Step 5: Solve for x
   x = 229,870,384,704/221,378
6. Step 6: Final answer
   x = 1,038,361.47