Finding the Fourth Proportional to 2,820.52, 3,863.85 and 2,788.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.52 : 3,863.85 = 2,788.92 : x
2. Step 2: Convert to fraction form
   2,820.52/3,863.85 = 2,788.92/x
3. Step 3: Cross multiply
   2,820.52x = 3,863.85 × 2,788.92
4. Step 4: Simplify right side
   2,820.52x = 10,775,968.54
5. Step 5: Solve for x
   x = 10,775,968.54/2,820.52
6. Step 6: Final answer
   x = 3,820.56