Finding the Fourth Proportional to 3,759.80, 5,188.86 and 2,081.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,759.80 : 5,188.86 = 2,081.60 : x
2. Step 2: Convert to fraction form
   3,759.80/5,188.86 = 2,081.60/x
3. Step 3: Cross multiply
   3,759.80x = 5,188.86 × 2,081.60
4. Step 4: Simplify right side
   3,759.80x = 10,801,130.98
5. Step 5: Solve for x
   x = 10,801,130.98/3,759.80
6. Step 6: Final answer
   x = 2,872.79