Finding the Third Proportional to 491,610 and 672,801

Step by Step Solution

1. Step 1: Write the proportion equation
   491,610 : 672,801 = 672,801 : x
2. Step 2: Convert to fraction form
   491,610/672,801 = 672,801/x
3. Step 3: Cross multiply
   491,610x = 672,801 × 672,801
4. Step 4: Simplify right side
   491,610x = 452,661,185,601
5. Step 5: Solve for x
   x = 452,661,185,601/491,610
6. Step 6: Final answer
   x = 920,772.94