Finding the Third Proportional to 441,320 and 661,836

Step by Step Solution

1. Step 1: Write the proportion equation
   441,320 : 661,836 = 661,836 : x
2. Step 2: Convert to fraction form
   441,320/661,836 = 661,836/x
3. Step 3: Cross multiply
   441,320x = 661,836 × 661,836
4. Step 4: Simplify right side
   441,320x = 438,026,890,896
5. Step 5: Solve for x
   x = 438,026,890,896/441,320
6. Step 6: Final answer
   x = 992,538.05