Finding the Fourth Proportional to 2,555.55, 3,829.86 and 1,386

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.55 : 3,829.86 = 1,386 : x
2. Step 2: Convert to fraction form
   2,555.55/3,829.86 = 1,386/x
3. Step 3: Cross multiply
   2,555.55x = 3,829.86 × 1,386
4. Step 4: Simplify right side
   2,555.55x = 5,308,185.96
5. Step 5: Solve for x
   x = 5,308,185.96/2,555.55
6. Step 6: Final answer
   x = 2,077.12