Finding the Third Proportional to 200,540 and 445,908

Step by Step Solution

1. Step 1: Write the proportion equation
   200,540 : 445,908 = 445,908 : x
2. Step 2: Convert to fraction form
   200,540/445,908 = 445,908/x
3. Step 3: Cross multiply
   200,540x = 445,908 × 445,908
4. Step 4: Simplify right side
   200,540x = 198,833,944,464
5. Step 5: Solve for x
   x = 198,833,944,464/200,540
6. Step 6: Final answer
   x = 991,492.69