Finding the Third Proportional to 200,555 and 300,876

Step by Step Solution

1. Step 1: Write the proportion equation
   200,555 : 300,876 = 300,876 : x
2. Step 2: Convert to fraction form
   200,555/300,876 = 300,876/x
3. Step 3: Cross multiply
   200,555x = 300,876 × 300,876
4. Step 4: Simplify right side
   200,555x = 90,526,367,376
5. Step 5: Solve for x
   x = 90,526,367,376/200,555
6. Step 6: Final answer
   x = 451,379.26