Finding the Fourth Proportional to 2,676.64, 4,015.56 and 827.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,676.64 : 4,015.56 = 827.69 : x
2. Step 2: Convert to fraction form
   2,676.64/4,015.56 = 827.69/x
3. Step 3: Cross multiply
   2,676.64x = 4,015.56 × 827.69
4. Step 4: Simplify right side
   2,676.64x = 3,323,638.86
5. Step 5: Solve for x
   x = 3,323,638.86/2,676.64
6. Step 6: Final answer
   x = 1,241.72