Finding the Fourth Proportional to 2,815.20, 3,882.96 and 2,018.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.20 : 3,882.96 = 2,018.52 : x
2. Step 2: Convert to fraction form
   2,815.20/3,882.96 = 2,018.52/x
3. Step 3: Cross multiply
   2,815.20x = 3,882.96 × 2,018.52
4. Step 4: Simplify right side
   2,815.20x = 7,837,832.42
5. Step 5: Solve for x
   x = 7,837,832.42/2,815.20
6. Step 6: Final answer
   x = 2,784.11