Finding the Fourth Proportional to 2,572.99, 3,859 and 1,255.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.99 : 3,859 = 1,255.42 : x
2. Step 2: Convert to fraction form
   2,572.99/3,859 = 1,255.42/x
3. Step 3: Cross multiply
   2,572.99x = 3,859 × 1,255.42
4. Step 4: Simplify right side
   2,572.99x = 4,844,665.78
5. Step 5: Solve for x
   x = 4,844,665.78/2,572.99
6. Step 6: Final answer
   x = 1,882.89