Finding the Fourth Proportional to 2,089.45, 3,131.83 and 855.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.45 : 3,131.83 = 855.37 : x
2. Step 2: Convert to fraction form
   2,089.45/3,131.83 = 855.37/x
3. Step 3: Cross multiply
   2,089.45x = 3,131.83 × 855.37
4. Step 4: Simplify right side
   2,089.45x = 2,678,873.43
5. Step 5: Solve for x
   x = 2,678,873.43/2,089.45
6. Step 6: Final answer
   x = 1,282.10