Finding the Fourth Proportional to 2,819.76, 3,882.72 and 2,556.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.76 : 3,882.72 = 2,556.12 : x
2. Step 2: Convert to fraction form
   2,819.76/3,882.72 = 2,556.12/x
3. Step 3: Cross multiply
   2,819.76x = 3,882.72 × 2,556.12
4. Step 4: Simplify right side
   2,819.76x = 9,924,698.25
5. Step 5: Solve for x
   x = 9,924,698.25/2,819.76
6. Step 6: Final answer
   x = 3,519.70