Finding the Third Proportional to 221,898 and 485,228

Step by Step Solution

1. Step 1: Write the proportion equation
   221,898 : 485,228 = 485,228 : x
2. Step 2: Convert to fraction form
   221,898/485,228 = 485,228/x
3. Step 3: Cross multiply
   221,898x = 485,228 × 485,228
4. Step 4: Simplify right side
   221,898x = 235,446,211,984
5. Step 5: Solve for x
   x = 235,446,211,984/221,898
6. Step 6: Final answer
   x = 1,061,056.03