Finding the Fourth Proportional to 3,856.83, 5,784.05 and 1,391.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.83 : 5,784.05 = 1,391.33 : x
2. Step 2: Convert to fraction form
   3,856.83/5,784.05 = 1,391.33/x
3. Step 3: Cross multiply
   3,856.83x = 5,784.05 × 1,391.33
4. Step 4: Simplify right side
   3,856.83x = 8,047,522.29
5. Step 5: Solve for x
   x = 8,047,522.29/3,856.83
6. Step 6: Final answer
   x = 2,086.56