Finding the Fourth Proportional to 2,081.12, 2,866.80 and 1,687.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.12 : 2,866.80 = 1,687.04 : x
2. Step 2: Convert to fraction form
   2,081.12/2,866.80 = 1,687.04/x
3. Step 3: Cross multiply
   2,081.12x = 2,866.80 × 1,687.04
4. Step 4: Simplify right side
   2,081.12x = 4,836,406.27
5. Step 5: Solve for x
   x = 4,836,406.27/2,081.12
6. Step 6: Final answer
   x = 2,323.94