Finding the Third Proportional to 202,768 and 487,872

Step by Step Solution

1. Step 1: Write the proportion equation
   202,768 : 487,872 = 487,872 : x
2. Step 2: Convert to fraction form
   202,768/487,872 = 487,872/x
3. Step 3: Cross multiply
   202,768x = 487,872 × 487,872
4. Step 4: Simplify right side
   202,768x = 238,019,088,384
5. Step 5: Solve for x
   x = 238,019,088,384/202,768
6. Step 6: Final answer
   x = 1,173,849.37