Finding the Fourth Proportional to 3,485.88, 5,227.59 and 1,145.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.88 : 5,227.59 = 1,145.25 : x
2. Step 2: Convert to fraction form
   3,485.88/5,227.59 = 1,145.25/x
3. Step 3: Cross multiply
   3,485.88x = 5,227.59 × 1,145.25
4. Step 4: Simplify right side
   3,485.88x = 5,986,897.45
5. Step 5: Solve for x
   x = 5,986,897.45/3,485.88
6. Step 6: Final answer
   x = 1,717.47