Finding the Fourth Proportional to 3,551.38, 5,327.88 and 1,086.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,551.38 : 5,327.88 = 1,086.55 : x
2. Step 2: Convert to fraction form
   3,551.38/5,327.88 = 1,086.55/x
3. Step 3: Cross multiply
   3,551.38x = 5,327.88 × 1,086.55
4. Step 4: Simplify right side
   3,551.38x = 5,789,008.01
5. Step 5: Solve for x
   x = 5,789,008.01/3,551.38
6. Step 6: Final answer
   x = 1,630.07