Finding the Fourth Proportional to 3,899.35, 5,379.57 and 2,404.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.35 : 5,379.57 = 2,404.67 : x
2. Step 2: Convert to fraction form
   3,899.35/5,379.57 = 2,404.67/x
3. Step 3: Cross multiply
   3,899.35x = 5,379.57 × 2,404.67
4. Step 4: Simplify right side
   3,899.35x = 12,936,106.33
5. Step 5: Solve for x
   x = 12,936,106.33/3,899.35
6. Step 6: Final answer
   x = 3,317.50