Finding the Fourth Proportional to 3,553.27, 5,328.79 and 1,087.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,553.27 : 5,328.79 = 1,087.43 : x
2. Step 2: Convert to fraction form
   3,553.27/5,328.79 = 1,087.43/x
3. Step 3: Cross multiply
   3,553.27x = 5,328.79 × 1,087.43
4. Step 4: Simplify right side
   3,553.27x = 5,794,656.75
5. Step 5: Solve for x
   x = 5,794,656.75/3,553.27
6. Step 6: Final answer
   x = 1,630.80