Finding the Third Proportional to 91,469 and 200,428

Step by Step Solution

1. Step 1: Write the proportion equation
   91,469 : 200,428 = 200,428 : x
2. Step 2: Convert to fraction form
   91,469/200,428 = 200,428/x
3. Step 3: Cross multiply
   91,469x = 200,428 × 200,428
4. Step 4: Simplify right side
   91,469x = 40,171,383,184
5. Step 5: Solve for x
   x = 40,171,383,184/91,469
6. Step 6: Final answer
   x = 439,180.30