Finding the Fourth Proportional to 3,380.67, 5,072.78 and 2,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,380.67 : 5,072.78 = 2,399.82 : x
2. Step 2: Convert to fraction form
   3,380.67/5,072.78 = 2,399.82/x
3. Step 3: Cross multiply
   3,380.67x = 5,072.78 × 2,399.82
4. Step 4: Simplify right side
   3,380.67x = 12,173,758.90
5. Step 5: Solve for x
   x = 12,173,758.90/3,380.67
6. Step 6: Final answer
   x = 3,600.99