Finding the Fourth Proportional to 2,557.36, 3,528.72 and 1,509.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.36 : 3,528.72 = 1,509.76 : x
2. Step 2: Convert to fraction form
   2,557.36/3,528.72 = 1,509.76/x
3. Step 3: Cross multiply
   2,557.36x = 3,528.72 × 1,509.76
4. Step 4: Simplify right side
   2,557.36x = 5,327,520.31
5. Step 5: Solve for x
   x = 5,327,520.31/2,557.36
6. Step 6: Final answer
   x = 2,083.21