Finding the Fourth Proportional to 2,838.43, 4,256.43 and 890.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,838.43 : 4,256.43 = 890.18 : x
2. Step 2: Convert to fraction form
   2,838.43/4,256.43 = 890.18/x
3. Step 3: Cross multiply
   2,838.43x = 4,256.43 × 890.18
4. Step 4: Simplify right side
   2,838.43x = 3,788,988.86
5. Step 5: Solve for x
   x = 3,788,988.86/2,838.43
6. Step 6: Final answer
   x = 1,334.89