Finding the Third Proportional to 145,242 and 200,007

Step by Step Solution

1. Step 1: Write the proportion equation
   145,242 : 200,007 = 200,007 : x
2. Step 2: Convert to fraction form
   145,242/200,007 = 200,007/x
3. Step 3: Cross multiply
   145,242x = 200,007 × 200,007
4. Step 4: Simplify right side
   145,242x = 40,002,800,049
5. Step 5: Solve for x
   x = 40,002,800,049/145,242
6. Step 6: Final answer
   x = 275,421.71