Finding the Fourth Proportional to 2,556.07, 3,836.21 and 1,323.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.07 : 3,836.21 = 1,323.86 : x
2. Step 2: Convert to fraction form
   2,556.07/3,836.21 = 1,323.86/x
3. Step 3: Cross multiply
   2,556.07x = 3,836.21 × 1,323.86
4. Step 4: Simplify right side
   2,556.07x = 5,078,579.17
5. Step 5: Solve for x
   x = 5,078,579.17/2,556.07
6. Step 6: Final answer
   x = 1,986.87