Finding the Third Proportional to 298,097 and 638,850

Step by Step Solution

1. Step 1: Write the proportion equation
   298,097 : 638,850 = 638,850 : x
2. Step 2: Convert to fraction form
   298,097/638,850 = 638,850/x
3. Step 3: Cross multiply
   298,097x = 638,850 × 638,850
4. Step 4: Simplify right side
   298,097x = 408,129,322,500
5. Step 5: Solve for x
   x = 408,129,322,500/298,097
6. Step 6: Final answer
   x = 1,369,115.83