Finding the Fourth Proportional to 2,389.16, 3,584.79 and 928.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.16 : 3,584.79 = 928.42 : x
2. Step 2: Convert to fraction form
   2,389.16/3,584.79 = 928.42/x
3. Step 3: Cross multiply
   2,389.16x = 3,584.79 × 928.42
4. Step 4: Simplify right side
   2,389.16x = 3,328,190.73
5. Step 5: Solve for x
   x = 3,328,190.73/2,389.16
6. Step 6: Final answer
   x = 1,393.04