Finding the Fourth Proportional to 11,819.54, 17,723.53 and 3,919.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,819.54 : 17,723.53 = 3,919.40 : x
2. Step 2: Convert to fraction form
   11,819.54/17,723.53 = 3,919.40/x
3. Step 3: Cross multiply
   11,819.54x = 17,723.53 × 3,919.40
4. Step 4: Simplify right side
   11,819.54x = 69,465,597.37
5. Step 5: Solve for x
   x = 69,465,597.37/11,819.54
6. Step 6: Final answer
   x = 5,877.18