Finding the Fourth Proportional to 12,859.43, 19,290.52 and 4,092.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.43 : 19,290.52 = 4,092.29 : x
2. Step 2: Convert to fraction form
   12,859.43/19,290.52 = 4,092.29/x
3. Step 3: Cross multiply
   12,859.43x = 19,290.52 × 4,092.29
4. Step 4: Simplify right side
   12,859.43x = 78,942,383.09
5. Step 5: Solve for x
   x = 78,942,383.09/12,859.43
6. Step 6: Final answer
   x = 6,138.87