Finding the Fourth Proportional to 3,883.62, 5,826.78 and 1,286.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,883.62 : 5,826.78 = 1,286.76 : x
2. Step 2: Convert to fraction form
   3,883.62/5,826.78 = 1,286.76/x
3. Step 3: Cross multiply
   3,883.62x = 5,826.78 × 1,286.76
4. Step 4: Simplify right side
   3,883.62x = 7,497,667.43
5. Step 5: Solve for x
   x = 7,497,667.43/3,883.62
6. Step 6: Final answer
   x = 1,930.59