Finding the Third Proportional to 426,837 and 618,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   426,837 : 618,223.50 = 618,223.50 : x
2. Step 2: Convert to fraction form
   426,837/618,223.50 = 618,223.50/x
3. Step 3: Cross multiply
   426,837x = 618,223.50 × 618,223.50
4. Step 4: Simplify right side
   426,837x = 382,200,295,952.25
5. Step 5: Solve for x
   x = 382,200,295,952.25/426,837
6. Step 6: Final answer
   x = 895,424.47