Finding the Fourth Proportional to 3,486.56, 5,228.92 and 1,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,486.56 : 5,228.92 = 1,020.72 : x
2. Step 2: Convert to fraction form
   3,486.56/5,228.92 = 1,020.72/x
3. Step 3: Cross multiply
   3,486.56x = 5,228.92 × 1,020.72
4. Step 4: Simplify right side
   3,486.56x = 5,337,263.22
5. Step 5: Solve for x
   x = 5,337,263.22/3,486.56
6. Step 6: Final answer
   x = 1,530.81