Finding the Fourth Proportional to 2,556.40, 3,829.48 and 1,306.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.40 : 3,829.48 = 1,306.94 : x
2. Step 2: Convert to fraction form
   2,556.40/3,829.48 = 1,306.94/x
3. Step 3: Cross multiply
   2,556.40x = 3,829.48 × 1,306.94
4. Step 4: Simplify right side
   2,556.40x = 5,004,900.59
5. Step 5: Solve for x
   x = 5,004,900.59/2,556.40
6. Step 6: Final answer
   x = 1,957.79