Finding the Fourth Proportional to 2,388.48, 3,582.71 and 928.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.48 : 3,582.71 = 928.65 : x
2. Step 2: Convert to fraction form
   2,388.48/3,582.71 = 928.65/x
3. Step 3: Cross multiply
   2,388.48x = 3,582.71 × 928.65
4. Step 4: Simplify right side
   2,388.48x = 3,327,083.64
5. Step 5: Solve for x
   x = 3,327,083.64/2,388.48
6. Step 6: Final answer
   x = 1,392.97