Finding the Fourth Proportional to 3,853.46, 5,776.72 and 1,386.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.46 : 5,776.72 = 1,386.55 : x
2. Step 2: Convert to fraction form
   3,853.46/5,776.72 = 1,386.55/x
3. Step 3: Cross multiply
   3,853.46x = 5,776.72 × 1,386.55
4. Step 4: Simplify right side
   3,853.46x = 8,009,711.12
5. Step 5: Solve for x
   x = 8,009,711.12/3,853.46
6. Step 6: Final answer
   x = 2,078.58