Finding the Third Proportional to 221,854.50 and 485,919

Step by Step Solution

1. Step 1: Write the proportion equation
   221,854.50 : 485,919 = 485,919 : x
2. Step 2: Convert to fraction form
   221,854.50/485,919 = 485,919/x
3. Step 3: Cross multiply
   221,854.50x = 485,919 × 485,919
4. Step 4: Simplify right side
   221,854.50x = 236,117,274,561
5. Step 5: Solve for x
   x = 236,117,274,561/221,854.50
6. Step 6: Final answer
   x = 1,064,288.87