Finding the Third Proportional to 398,756 and 875,018

Step by Step Solution

1. Step 1: Write the proportion equation
   398,756 : 875,018 = 875,018 : x
2. Step 2: Convert to fraction form
   398,756/875,018 = 875,018/x
3. Step 3: Cross multiply
   398,756x = 875,018 × 875,018
4. Step 4: Simplify right side
   398,756x = 765,656,500,324
5. Step 5: Solve for x
   x = 765,656,500,324/398,756
6. Step 6: Final answer
   x = 1,920,112.80