Finding the Third Proportional to 400,256 and 619,087

Step by Step Solution

1. Step 1: Write the proportion equation
   400,256 : 619,087 = 619,087 : x
2. Step 2: Convert to fraction form
   400,256/619,087 = 619,087/x
3. Step 3: Cross multiply
   400,256x = 619,087 × 619,087
4. Step 4: Simplify right side
   400,256x = 383,268,713,569
5. Step 5: Solve for x
   x = 383,268,713,569/400,256
6. Step 6: Final answer
   x = 957,558.95