Finding the Fourth Proportional to 2,582.80, 3,564.30 and 1,521.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,582.80 : 3,564.30 = 1,521.28 : x
2. Step 2: Convert to fraction form
   2,582.80/3,564.30 = 1,521.28/x
3. Step 3: Cross multiply
   2,582.80x = 3,564.30 × 1,521.28
4. Step 4: Simplify right side
   2,582.80x = 5,422,298.30
5. Step 5: Solve for x
   x = 5,422,298.30/2,582.80
6. Step 6: Final answer
   x = 2,099.39