Finding the Fourth Proportional to 2,143.03, 2,958.35 and 1,258.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.03 : 2,958.35 = 1,258.89 : x
2. Step 2: Convert to fraction form
   2,143.03/2,958.35 = 1,258.89/x
3. Step 3: Cross multiply
   2,143.03x = 2,958.35 × 1,258.89
4. Step 4: Simplify right side
   2,143.03x = 3,724,237.23
5. Step 5: Solve for x
   x = 3,724,237.23/2,143.03
6. Step 6: Final answer
   x = 1,737.84