Finding the Fourth Proportional to 3,485.83, 5,227.64 and 1,145.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.83 : 5,227.64 = 1,145.30 : x
2. Step 2: Convert to fraction form
   3,485.83/5,227.64 = 1,145.30/x
3. Step 3: Cross multiply
   3,485.83x = 5,227.64 × 1,145.30
4. Step 4: Simplify right side
   3,485.83x = 5,987,212.36
5. Step 5: Solve for x
   x = 5,987,212.36/3,485.83
6. Step 6: Final answer
   x = 1,717.58