Finding the Third Proportional to 225,920 and 486,830

Step by Step Solution

1. Step 1: Write the proportion equation
   225,920 : 486,830 = 486,830 : x
2. Step 2: Convert to fraction form
   225,920/486,830 = 486,830/x
3. Step 3: Cross multiply
   225,920x = 486,830 × 486,830
4. Step 4: Simplify right side
   225,920x = 237,003,448,900
5. Step 5: Solve for x
   x = 237,003,448,900/225,920
6. Step 6: Final answer
   x = 1,049,059.18