Finding the Third Proportional to 221,492 and 485,892

Step by Step Solution

1. Step 1: Write the proportion equation
   221,492 : 485,892 = 485,892 : x
2. Step 2: Convert to fraction form
   221,492/485,892 = 485,892/x
3. Step 3: Cross multiply
   221,492x = 485,892 × 485,892
4. Step 4: Simplify right side
   221,492x = 236,091,035,664
5. Step 5: Solve for x
   x = 236,091,035,664/221,492
6. Step 6: Final answer
   x = 1,065,912.25