Finding the Fourth Proportional to 2,387.98, 3,582.57 and 927.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.98 : 3,582.57 = 927.55 : x
2. Step 2: Convert to fraction form
   2,387.98/3,582.57 = 927.55/x
3. Step 3: Cross multiply
   2,387.98x = 3,582.57 × 927.55
4. Step 4: Simplify right side
   2,387.98x = 3,323,012.80
5. Step 5: Solve for x
   x = 3,323,012.80/2,387.98
6. Step 6: Final answer
   x = 1,391.56