Finding the Third Proportional to 91,109 and 200,155

Step by Step Solution

1. Step 1: Write the proportion equation
   91,109 : 200,155 = 200,155 : x
2. Step 2: Convert to fraction form
   91,109/200,155 = 200,155/x
3. Step 3: Cross multiply
   91,109x = 200,155 × 200,155
4. Step 4: Simplify right side
   91,109x = 40,062,024,025
5. Step 5: Solve for x
   x = 40,062,024,025/91,109
6. Step 6: Final answer
   x = 439,715.33