Finding the Fourth Proportional to 13,185.16, 19,775.58 and 3,949

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.16 : 19,775.58 = 3,949 : x
2. Step 2: Convert to fraction form
   13,185.16/19,775.58 = 3,949/x
3. Step 3: Cross multiply
   13,185.16x = 19,775.58 × 3,949
4. Step 4: Simplify right side
   13,185.16x = 78,093,765.42
5. Step 5: Solve for x
   x = 78,093,765.42/13,185.16
6. Step 6: Final answer
   x = 5,922.85