Finding the Third Proportional to 91,720 and 200,810

Step by Step Solution

1. Step 1: Write the proportion equation
   91,720 : 200,810 = 200,810 : x
2. Step 2: Convert to fraction form
   91,720/200,810 = 200,810/x
3. Step 3: Cross multiply
   91,720x = 200,810 × 200,810
4. Step 4: Simplify right side
   91,720x = 40,324,656,100
5. Step 5: Solve for x
   x = 40,324,656,100/91,720
6. Step 6: Final answer
   x = 439,649.54