Finding the Third Proportional to 202,872 and 447,216

Step by Step Solution

1. Step 1: Write the proportion equation
   202,872 : 447,216 = 447,216 : x
2. Step 2: Convert to fraction form
   202,872/447,216 = 447,216/x
3. Step 3: Cross multiply
   202,872x = 447,216 × 447,216
4. Step 4: Simplify right side
   202,872x = 200,002,150,656
5. Step 5: Solve for x
   x = 200,002,150,656/202,872
6. Step 6: Final answer
   x = 985,853.89