Finding the Third Proportional to 221,730 and 486,380

Step by Step Solution

1. Step 1: Write the proportion equation
   221,730 : 486,380 = 486,380 : x
2. Step 2: Convert to fraction form
   221,730/486,380 = 486,380/x
3. Step 3: Cross multiply
   221,730x = 486,380 × 486,380
4. Step 4: Simplify right side
   221,730x = 236,565,504,400
5. Step 5: Solve for x
   x = 236,565,504,400/221,730
6. Step 6: Final answer
   x = 1,066,907.97