Finding the Third Proportional to 91,220 and 200,422

Step by Step Solution

1. Step 1: Write the proportion equation
   91,220 : 200,422 = 200,422 : x
2. Step 2: Convert to fraction form
   91,220/200,422 = 200,422/x
3. Step 3: Cross multiply
   91,220x = 200,422 × 200,422
4. Step 4: Simplify right side
   91,220x = 40,168,978,084
5. Step 5: Solve for x
   x = 40,168,978,084/91,220
6. Step 6: Final answer
   x = 440,352.75