Finding the Fourth Proportional to 2,839.15, 4,258.08 and 890.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.15 : 4,258.08 = 890.89 : x
2. Step 2: Convert to fraction form
   2,839.15/4,258.08 = 890.89/x
3. Step 3: Cross multiply
   2,839.15x = 4,258.08 × 890.89
4. Step 4: Simplify right side
   2,839.15x = 3,793,480.89
5. Step 5: Solve for x
   x = 3,793,480.89/2,839.15
6. Step 6: Final answer
   x = 1,336.13