Finding the Third Proportional to 297,118 and 447,099

Step by Step Solution

1. Step 1: Write the proportion equation
   297,118 : 447,099 = 447,099 : x
2. Step 2: Convert to fraction form
   297,118/447,099 = 447,099/x
3. Step 3: Cross multiply
   297,118x = 447,099 × 447,099
4. Step 4: Simplify right side
   297,118x = 199,897,515,801
5. Step 5: Solve for x
   x = 199,897,515,801/297,118
6. Step 6: Final answer
   x = 672,788.31