Finding the Fourth Proportional to 3,085.42, 4,258.50 and 2,143.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,085.42 : 4,258.50 = 2,143.18 : x
2. Step 2: Convert to fraction form
   3,085.42/4,258.50 = 2,143.18/x
3. Step 3: Cross multiply
   3,085.42x = 4,258.50 × 2,143.18
4. Step 4: Simplify right side
   3,085.42x = 9,126,732.03
5. Step 5: Solve for x
   x = 9,126,732.03/3,085.42
6. Step 6: Final answer
   x = 2,958.02