Finding the Fourth Proportional to 3,806.78, 5,251.82 and 2,480.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,806.78 : 5,251.82 = 2,480.00 : x
2. Step 2: Convert to fraction form
   3,806.78/5,251.82 = 2,480.00/x
3. Step 3: Cross multiply
   3,806.78x = 5,251.82 × 2,480.00
4. Step 4: Simplify right side
   3,806.78x = 13,024,474.94
5. Step 5: Solve for x
   x = 13,024,474.94/3,806.78
6. Step 6: Final answer
   x = 3,421.39