Finding the Fourth Proportional to 3,822.30, 5,278.98 and 3,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,822.30 : 5,278.98 = 3,078.72 : x
2. Step 2: Convert to fraction form
   3,822.30/5,278.98 = 3,078.72/x
3. Step 3: Cross multiply
   3,822.30x = 5,278.98 × 3,078.72
4. Step 4: Simplify right side
   3,822.30x = 16,252,501.31
5. Step 5: Solve for x
   x = 16,252,501.31/3,822.30
6. Step 6: Final answer
   x = 4,252.02