Finding the Third Proportional to 855.38 and 1,821.38

Step by Step Solution

1. Step 1: Write the proportion equation
   855.38 : 1,821.38 = 1,821.38 : x
2. Step 2: Convert to fraction form
   855.38/1,821.38 = 1,821.38/x
3. Step 3: Cross multiply
   855.38x = 1,821.38 × 1,821.38
4. Step 4: Simplify right side
   855.38x = 3,317,406.89
5. Step 5: Solve for x
   x = 3,317,406.89/855.38
6. Step 6: Final answer
   x = 3,878.31