Finding the Fourth Proportional to 2,557.62, 3,529.41 and 1,423.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.62 : 3,529.41 = 1,423.25 : x
2. Step 2: Convert to fraction form
   2,557.62/3,529.41 = 1,423.25/x
3. Step 3: Cross multiply
   2,557.62x = 3,529.41 × 1,423.25
4. Step 4: Simplify right side
   2,557.62x = 5,023,215.14
5. Step 5: Solve for x
   x = 5,023,215.14/2,557.62
6. Step 6: Final answer
   x = 1,964.02