Finding the Fourth Proportional to 5,398.25, 8,099.69 and 3,919.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,398.25 : 8,099.69 = 3,919.10 : x
2. Step 2: Convert to fraction form
   5,398.25/8,099.69 = 3,919.10/x
3. Step 3: Cross multiply
   5,398.25x = 8,099.69 × 3,919.10
4. Step 4: Simplify right side
   5,398.25x = 31,743,434.99
5. Step 5: Solve for x
   x = 31,743,434.99/5,398.25
6. Step 6: Final answer
   x = 5,880.32