Finding the Fourth Proportional to 3,659.12, 5,049.80 and 2,087.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,659.12 : 5,049.80 = 2,087.72 : x
2. Step 2: Convert to fraction form
   3,659.12/5,049.80 = 2,087.72/x
3. Step 3: Cross multiply
   3,659.12x = 5,049.80 × 2,087.72
4. Step 4: Simplify right side
   3,659.12x = 10,542,568.46
5. Step 5: Solve for x
   x = 10,542,568.46/3,659.12
6. Step 6: Final answer
   x = 2,881.18