Finding the Third Proportional to 259,788 and 400,626

Step by Step Solution

1. Step 1: Write the proportion equation
   259,788 : 400,626 = 400,626 : x
2. Step 2: Convert to fraction form
   259,788/400,626 = 400,626/x
3. Step 3: Cross multiply
   259,788x = 400,626 × 400,626
4. Step 4: Simplify right side
   259,788x = 160,501,191,876
5. Step 5: Solve for x
   x = 160,501,191,876/259,788
6. Step 6: Final answer
   x = 617,816.03