Finding the Fourth Proportional to 12,179.31, 18,269.48 and 3,859.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.31 : 18,269.48 = 3,859.15 : x
2. Step 2: Convert to fraction form
   12,179.31/18,269.48 = 3,859.15/x
3. Step 3: Cross multiply
   12,179.31x = 18,269.48 × 3,859.15
4. Step 4: Simplify right side
   12,179.31x = 70,504,605.88
5. Step 5: Solve for x
   x = 70,504,605.88/12,179.31
6. Step 6: Final answer
   x = 5,788.88