Finding the Fourth Proportional to 3,553.30, 5,328.60 and 1,087.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,553.30 : 5,328.60 = 1,087.30 : x
2. Step 2: Convert to fraction form
   3,553.30/5,328.60 = 1,087.30/x
3. Step 3: Cross multiply
   3,553.30x = 5,328.60 × 1,087.30
4. Step 4: Simplify right side
   3,553.30x = 5,793,786.78
5. Step 5: Solve for x
   x = 5,793,786.78/3,553.30
6. Step 6: Final answer
   x = 1,630.54