Finding the Fourth Proportional to 3,485.09, 5,228.27 and 1,145.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.09 : 5,228.27 = 1,145.23 : x
2. Step 2: Convert to fraction form
   3,485.09/5,228.27 = 1,145.23/x
3. Step 3: Cross multiply
   3,485.09x = 5,228.27 × 1,145.23
4. Step 4: Simplify right side
   3,485.09x = 5,987,561.44
5. Step 5: Solve for x
   x = 5,987,561.44/3,485.09
6. Step 6: Final answer
   x = 1,718.05