Finding the Fourth Proportional to 2,085.12, 3,106.96 and 1,855.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.12 : 3,106.96 = 1,855.36 : x
2. Step 2: Convert to fraction form
   2,085.12/3,106.96 = 1,855.36/x
3. Step 3: Cross multiply
   2,085.12x = 3,106.96 × 1,855.36
4. Step 4: Simplify right side
   2,085.12x = 5,764,529.31
5. Step 5: Solve for x
   x = 5,764,529.31/2,085.12
6. Step 6: Final answer
   x = 2,764.60