Finding the Third Proportional to 221,748 and 486,018

Step by Step Solution

1. Step 1: Write the proportion equation
   221,748 : 486,018 = 486,018 : x
2. Step 2: Convert to fraction form
   221,748/486,018 = 486,018/x
3. Step 3: Cross multiply
   221,748x = 486,018 × 486,018
4. Step 4: Simplify right side
   221,748x = 236,213,496,324
5. Step 5: Solve for x
   x = 236,213,496,324/221,748
6. Step 6: Final answer
   x = 1,065,233.94