Finding the Third Proportional to 221,486 and 485,874

Step by Step Solution

1. Step 1: Write the proportion equation
   221,486 : 485,874 = 485,874 : x
2. Step 2: Convert to fraction form
   221,486/485,874 = 485,874/x
3. Step 3: Cross multiply
   221,486x = 485,874 × 485,874
4. Step 4: Simplify right side
   221,486x = 236,073,543,876
5. Step 5: Solve for x
   x = 236,073,543,876/221,486
6. Step 6: Final answer
   x = 1,065,862.15