Finding the Fourth Proportional to 2,558.96, 3,530.37 and 1,439.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.96 : 3,530.37 = 1,439.65 : x
2. Step 2: Convert to fraction form
   2,558.96/3,530.37 = 1,439.65/x
3. Step 3: Cross multiply
   2,558.96x = 3,530.37 × 1,439.65
4. Step 4: Simplify right side
   2,558.96x = 5,082,472.32
5. Step 5: Solve for x
   x = 5,082,472.32/2,558.96
6. Step 6: Final answer
   x = 1,986.15