Finding the Fourth Proportional to 2,558.56, 3,530.62 and 1,424.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.56 : 3,530.62 = 1,424.28 : x
2. Step 2: Convert to fraction form
   2,558.56/3,530.62 = 1,424.28/x
3. Step 3: Cross multiply
   2,558.56x = 3,530.62 × 1,424.28
4. Step 4: Simplify right side
   2,558.56x = 5,028,591.45
5. Step 5: Solve for x
   x = 5,028,591.45/2,558.56
6. Step 6: Final answer
   x = 1,965.40