Finding the Third Proportional to 221,700 and 474,900

Step by Step Solution

1. Step 1: Write the proportion equation
   221,700 : 474,900 = 474,900 : x
2. Step 2: Convert to fraction form
   221,700/474,900 = 474,900/x
3. Step 3: Cross multiply
   221,700x = 474,900 × 474,900
4. Step 4: Simplify right side
   221,700x = 225,530,010,000
5. Step 5: Solve for x
   x = 225,530,010,000/221,700
6. Step 6: Final answer
   x = 1,017,275.64