Finding the Fourth Proportional to 3,485.31, 5,228 and 1,020.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.31 : 5,228 = 1,020.18 : x
2. Step 2: Convert to fraction form
   3,485.31/5,228 = 1,020.18/x
3. Step 3: Cross multiply
   3,485.31x = 5,228 × 1,020.18
4. Step 4: Simplify right side
   3,485.31x = 5,333,501.04
5. Step 5: Solve for x
   x = 5,333,501.04/3,485.31
6. Step 6: Final answer
   x = 1,530.28