Finding the Fourth Proportional to 2,556.55, 3,835.37 and 1,386.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.55 : 3,835.37 = 1,386.51 : x
2. Step 2: Convert to fraction form
   2,556.55/3,835.37 = 1,386.51/x
3. Step 3: Cross multiply
   2,556.55x = 3,835.37 × 1,386.51
4. Step 4: Simplify right side
   2,556.55x = 5,317,778.86
5. Step 5: Solve for x
   x = 5,317,778.86/2,556.55
6. Step 6: Final answer
   x = 2,080.06