Finding the Fourth Proportional to 2,557.20, 3,528.68 and 1,437.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.20 : 3,528.68 = 1,437.96 : x
2. Step 2: Convert to fraction form
   2,557.20/3,528.68 = 1,437.96/x
3. Step 3: Cross multiply
   2,557.20x = 3,528.68 × 1,437.96
4. Step 4: Simplify right side
   2,557.20x = 5,074,100.69
5. Step 5: Solve for x
   x = 5,074,100.69/2,557.20
6. Step 6: Final answer
   x = 1,984.24