Finding the Third Proportional to 394,590 and 855,577.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,590 : 855,577.50 = 855,577.50 : x
2. Step 2: Convert to fraction form
   394,590/855,577.50 = 855,577.50/x
3. Step 3: Cross multiply
   394,590x = 855,577.50 × 855,577.50
4. Step 4: Simplify right side
   394,590x = 732,012,858,506.25
5. Step 5: Solve for x
   x = 732,012,858,506.25/394,590
6. Step 6: Final answer
   x = 1,855,122.68