Finding the Fourth Proportional to 3,524.78, 5,287.92 and 1,059.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,524.78 : 5,287.92 = 1,059.39 : x
2. Step 2: Convert to fraction form
   3,524.78/5,287.92 = 1,059.39/x
3. Step 3: Cross multiply
   3,524.78x = 5,287.92 × 1,059.39
4. Step 4: Simplify right side
   3,524.78x = 5,601,969.57
5. Step 5: Solve for x
   x = 5,601,969.57/3,524.78
6. Step 6: Final answer
   x = 1,589.31