Finding the Third Proportional to 221,724 and 486,366

Step by Step Solution

1. Step 1: Write the proportion equation
   221,724 : 486,366 = 486,366 : x
2. Step 2: Convert to fraction form
   221,724/486,366 = 486,366/x
3. Step 3: Cross multiply
   221,724x = 486,366 × 486,366
4. Step 4: Simplify right side
   221,724x = 236,551,885,956
5. Step 5: Solve for x
   x = 236,551,885,956/221,724
6. Step 6: Final answer
   x = 1,066,875.42