Finding the Fourth Proportional to 13,321.69, 19,976.33 and 3,958.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.69 : 19,976.33 = 3,958.27 : x
2. Step 2: Convert to fraction form
   13,321.69/19,976.33 = 3,958.27/x
3. Step 3: Cross multiply
   13,321.69x = 19,976.33 × 3,958.27
4. Step 4: Simplify right side
   13,321.69x = 79,071,687.96
5. Step 5: Solve for x
   x = 79,071,687.96/13,321.69
6. Step 6: Final answer
   x = 5,935.56