Finding the Third Proportional to 221,768 and 474,640

Step by Step Solution

1. Step 1: Write the proportion equation
   221,768 : 474,640 = 474,640 : x
2. Step 2: Convert to fraction form
   221,768/474,640 = 474,640/x
3. Step 3: Cross multiply
   221,768x = 474,640 × 474,640
4. Step 4: Simplify right side
   221,768x = 225,283,129,600
5. Step 5: Solve for x
   x = 225,283,129,600/221,768
6. Step 6: Final answer
   x = 1,015,850.48