Finding the Third Proportional to 145,272 and 200,040

Step by Step Solution

1. Step 1: Write the proportion equation
   145,272 : 200,040 = 200,040 : x
2. Step 2: Convert to fraction form
   145,272/200,040 = 200,040/x
3. Step 3: Cross multiply
   145,272x = 200,040 × 200,040
4. Step 4: Simplify right side
   145,272x = 40,016,001,600
5. Step 5: Solve for x
   x = 40,016,001,600/145,272
6. Step 6: Final answer
   x = 275,455.71