Finding the Fourth Proportional to 3,551.87, 5,327.57 and 1,086.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,551.87 : 5,327.57 = 1,086.71 : x
2. Step 2: Convert to fraction form
   3,551.87/5,327.57 = 1,086.71/x
3. Step 3: Cross multiply
   3,551.87x = 5,327.57 × 1,086.71
4. Step 4: Simplify right side
   3,551.87x = 5,789,491.52
5. Step 5: Solve for x
   x = 5,789,491.52/3,551.87
6. Step 6: Final answer
   x = 1,629.99