Finding the Fourth Proportional to 3,485.30, 5,228.16 and 1,145.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.30 : 5,228.16 = 1,145.54 : x
2. Step 2: Convert to fraction form
   3,485.30/5,228.16 = 1,145.54/x
3. Step 3: Cross multiply
   3,485.30x = 5,228.16 × 1,145.54
4. Step 4: Simplify right side
   3,485.30x = 5,989,066.41
5. Step 5: Solve for x
   x = 5,989,066.41/3,485.30
6. Step 6: Final answer
   x = 1,718.38