Finding the Fourth Proportional to 2,576.56, 3,865.52 and 727.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.56 : 3,865.52 = 727.68 : x
2. Step 2: Convert to fraction form
   2,576.56/3,865.52 = 727.68/x
3. Step 3: Cross multiply
   2,576.56x = 3,865.52 × 727.68
4. Step 4: Simplify right side
   2,576.56x = 2,812,861.59
5. Step 5: Solve for x
   x = 2,812,861.59/2,576.56
6. Step 6: Final answer
   x = 1,091.71