Finding the Fourth Proportional to 2,059.12, 3,087.92 and 826.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.12 : 3,087.92 = 826.20 : x
2. Step 2: Convert to fraction form
   2,059.12/3,087.92 = 826.20/x
3. Step 3: Cross multiply
   2,059.12x = 3,087.92 × 826.20
4. Step 4: Simplify right side
   2,059.12x = 2,551,241.57
5. Step 5: Solve for x
   x = 2,551,241.57/2,059.12
6. Step 6: Final answer
   x = 1,239.00