Finding the Fourth Proportional to 2,389.27, 3,583.50 and 928.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.27 : 3,583.50 = 928.45 : x
2. Step 2: Convert to fraction form
   2,389.27/3,583.50 = 928.45/x
3. Step 3: Cross multiply
   2,389.27x = 3,583.50 × 928.45
4. Step 4: Simplify right side
   2,389.27x = 3,327,100.58
5. Step 5: Solve for x
   x = 3,327,100.58/2,389.27
6. Step 6: Final answer
   x = 1,392.52