Finding the Fourth Proportional to 2,676.09, 4,013.88 and 826.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,676.09 : 4,013.88 = 826.71 : x
2. Step 2: Convert to fraction form
   2,676.09/4,013.88 = 826.71/x
3. Step 3: Cross multiply
   2,676.09x = 4,013.88 × 826.71
4. Step 4: Simplify right side
   2,676.09x = 3,318,314.73
5. Step 5: Solve for x
   x = 3,318,314.73/2,676.09
6. Step 6: Final answer
   x = 1,239.99