Finding the Third Proportional to 398,757.75 and 875,017

Step by Step Solution

1. Step 1: Write the proportion equation
   398,757.75 : 875,017 = 875,017 : x
2. Step 2: Convert to fraction form
   398,757.75/875,017 = 875,017/x
3. Step 3: Cross multiply
   398,757.75x = 875,017 × 875,017
4. Step 4: Simplify right side
   398,757.75x = 765,654,750,289
5. Step 5: Solve for x
   x = 765,654,750,289/398,757.75
6. Step 6: Final answer
   x = 1,920,099.99