Finding the Fourth Proportional to 2,882.52, 3,978.32 and 1,821.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,882.52 : 3,978.32 = 1,821.15 : x
2. Step 2: Convert to fraction form
   2,882.52/3,978.32 = 1,821.15/x
3. Step 3: Cross multiply
   2,882.52x = 3,978.32 × 1,821.15
4. Step 4: Simplify right side
   2,882.52x = 7,245,108.36
5. Step 5: Solve for x
   x = 7,245,108.36/2,882.52
6. Step 6: Final answer
   x = 2,513.46