Finding the Fourth Proportional to 3,879.34, 5,820.90 and 3,558.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879.34 : 5,820.90 = 3,558.58 : x
2. Step 2: Convert to fraction form
   3,879.34/5,820.90 = 3,558.58/x
3. Step 3: Cross multiply
   3,879.34x = 5,820.90 × 3,558.58
4. Step 4: Simplify right side
   3,879.34x = 20,714,138.32
5. Step 5: Solve for x
   x = 20,714,138.32/3,879.34
6. Step 6: Final answer
   x = 5,339.60