Finding the Fourth Proportional to 3,849.78, 5,310.72 and 2,275.14

Step by Step Solution

1. Step 1: Write the proportion equation
   3,849.78 : 5,310.72 = 2,275.14 : x
2. Step 2: Convert to fraction form
   3,849.78/5,310.72 = 2,275.14/x
3. Step 3: Cross multiply
   3,849.78x = 5,310.72 × 2,275.14
4. Step 4: Simplify right side
   3,849.78x = 12,082,631.50
5. Step 5: Solve for x
   x = 12,082,631.50/3,849.78
6. Step 6: Final answer
   x = 3,138.53