Finding the Fourth Proportional to 2,864.79, 4,297.86 and 890.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.79 : 4,297.86 = 890.32 : x
2. Step 2: Convert to fraction form
   2,864.79/4,297.86 = 890.32/x
3. Step 3: Cross multiply
   2,864.79x = 4,297.86 × 890.32
4. Step 4: Simplify right side
   2,864.79x = 3,826,452.19
5. Step 5: Solve for x
   x = 3,826,452.19/2,864.79
6. Step 6: Final answer
   x = 1,335.68