Finding the Fourth Proportional to 2,388.56, 3,582.42 and 656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.56 : 3,582.42 = 656.72 : x
2. Step 2: Convert to fraction form
   2,388.56/3,582.42 = 656.72/x
3. Step 3: Cross multiply
   2,388.56x = 3,582.42 × 656.72
4. Step 4: Simplify right side
   2,388.56x = 2,352,646.86
5. Step 5: Solve for x
   x = 2,352,646.86/2,388.56
6. Step 6: Final answer
   x = 984.96