Finding the Fourth Proportional to 2,557.17, 3,528.90 and 1,509.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.17 : 3,528.90 = 1,509.30 : x
2. Step 2: Convert to fraction form
   2,557.17/3,528.90 = 1,509.30/x
3. Step 3: Cross multiply
   2,557.17x = 3,528.90 × 1,509.30
4. Step 4: Simplify right side
   2,557.17x = 5,326,168.77
5. Step 5: Solve for x
   x = 5,326,168.77/2,557.17
6. Step 6: Final answer
   x = 2,082.84