Finding the Fourth Proportional to 5,404.58, 8,101.29 and 3,920.09

Step by Step Solution

1. Step 1: Write the proportion equation
   5,404.58 : 8,101.29 = 3,920.09 : x
2. Step 2: Convert to fraction form
   5,404.58/8,101.29 = 3,920.09/x
3. Step 3: Cross multiply
   5,404.58x = 8,101.29 × 3,920.09
4. Step 4: Simplify right side
   5,404.58x = 31,757,745.41
5. Step 5: Solve for x
   x = 31,757,745.41/5,404.58
6. Step 6: Final answer
   x = 5,876.09