Finding the Fourth Proportional to 2,838.63, 4,258.35 and 890.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,838.63 : 4,258.35 = 890.31 : x
2. Step 2: Convert to fraction form
   2,838.63/4,258.35 = 890.31/x
3. Step 3: Cross multiply
   2,838.63x = 4,258.35 × 890.31
4. Step 4: Simplify right side
   2,838.63x = 3,791,251.59
5. Step 5: Solve for x
   x = 3,791,251.59/2,838.63
6. Step 6: Final answer
   x = 1,335.59