Finding the Fourth Proportional to 3,878.49, 5,359.59 and 3,170.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,878.49 : 5,359.59 = 3,170.09 : x
2. Step 2: Convert to fraction form
   3,878.49/5,359.59 = 3,170.09/x
3. Step 3: Cross multiply
   3,878.49x = 5,359.59 × 3,170.09
4. Step 4: Simplify right side
   3,878.49x = 16,990,374.83
5. Step 5: Solve for x
   x = 16,990,374.83/3,878.49
6. Step 6: Final answer
   x = 4,380.67