Finding the Fourth Proportional to 2,576.16, 3,555.08 and 1,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.16 : 3,555.08 = 1,528.72 : x
2. Step 2: Convert to fraction form
   2,576.16/3,555.08 = 1,528.72/x
3. Step 3: Cross multiply
   2,576.16x = 3,555.08 × 1,528.72
4. Step 4: Simplify right side
   2,576.16x = 5,434,721.90
5. Step 5: Solve for x
   x = 5,434,721.90/2,576.16
6. Step 6: Final answer
   x = 2,109.62