Finding the Third Proportional to 455,020 and 978,728

Step by Step Solution

1. Step 1: Write the proportion equation
   455,020 : 978,728 = 978,728 : x
2. Step 2: Convert to fraction form
   455,020/978,728 = 978,728/x
3. Step 3: Cross multiply
   455,020x = 978,728 × 978,728
4. Step 4: Simplify right side
   455,020x = 957,908,497,984
5. Step 5: Solve for x
   x = 957,908,497,984/455,020
6. Step 6: Final answer
   x = 2,105,200.87