Finding the Fourth Proportional to 3,551.55, 5,328.02 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,551.55 : 5,328.02 = 1,086.72 : x
2. Step 2: Convert to fraction form
   3,551.55/5,328.02 = 1,086.72/x
3. Step 3: Cross multiply
   3,551.55x = 5,328.02 × 1,086.72
4. Step 4: Simplify right side
   3,551.55x = 5,790,065.89
5. Step 5: Solve for x
   x = 5,790,065.89/3,551.55
6. Step 6: Final answer
   x = 1,630.29