Finding the Fourth Proportional to 2,521.92, 3,481.98 and 1,578.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.92 : 3,481.98 = 1,578.12 : x
2. Step 2: Convert to fraction form
   2,521.92/3,481.98 = 1,578.12/x
3. Step 3: Cross multiply
   2,521.92x = 3,481.98 × 1,578.12
4. Step 4: Simplify right side
   2,521.92x = 5,494,982.28
5. Step 5: Solve for x
   x = 5,494,982.28/2,521.92
6. Step 6: Final answer
   x = 2,178.89