Finding the Fourth Proportional to 2,557.83, 3,528.31 and 1,613.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.83 : 3,528.31 = 1,613.28 : x
2. Step 2: Convert to fraction form
   2,557.83/3,528.31 = 1,613.28/x
3. Step 3: Cross multiply
   2,557.83x = 3,528.31 × 1,613.28
4. Step 4: Simplify right side
   2,557.83x = 5,692,165.56
5. Step 5: Solve for x
   x = 5,692,165.56/2,557.83
6. Step 6: Final answer
   x = 2,225.39