Finding the Fourth Proportional to 2,171.56, 3,258.30 and 1,018.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.56 : 3,258.30 = 1,018.28 : x
2. Step 2: Convert to fraction form
   2,171.56/3,258.30 = 1,018.28/x
3. Step 3: Cross multiply
   2,171.56x = 3,258.30 × 1,018.28
4. Step 4: Simplify right side
   2,171.56x = 3,317,861.72
5. Step 5: Solve for x
   x = 3,317,861.72/2,171.56
6. Step 6: Final answer
   x = 1,527.87