Finding the Fourth Proportional to 13,179.06, 19,769.61 and 3,819.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,179.06 : 19,769.61 = 3,819.21 : x
2. Step 2: Convert to fraction form
   13,179.06/19,769.61 = 3,819.21/x
3. Step 3: Cross multiply
   13,179.06x = 19,769.61 × 3,819.21
4. Step 4: Simplify right side
   13,179.06x = 75,504,223.69
5. Step 5: Solve for x
   x = 75,504,223.69/13,179.06
6. Step 6: Final answer
   x = 5,729.10