Finding the Fourth Proportional to 3,759.81, 5,188.21 and 2,081.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,759.81 : 5,188.21 = 2,081.31 : x
2. Step 2: Convert to fraction form
   3,759.81/5,188.21 = 2,081.31/x
3. Step 3: Cross multiply
   3,759.81x = 5,188.21 × 2,081.31
4. Step 4: Simplify right side
   3,759.81x = 10,798,268.15
5. Step 5: Solve for x
   x = 10,798,268.15/3,759.81
6. Step 6: Final answer
   x = 2,872.02