Finding the Fourth Proportional to 13,329.42, 19,996.83 and 3,969.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,329.42 : 19,996.83 = 3,969.60 : x
2. Step 2: Convert to fraction form
   13,329.42/19,996.83 = 3,969.60/x
3. Step 3: Cross multiply
   13,329.42x = 19,996.83 × 3,969.60
4. Step 4: Simplify right side
   13,329.42x = 79,379,416.37
5. Step 5: Solve for x
   x = 79,379,416.37/13,329.42
6. Step 6: Final answer
   x = 5,955.20