Finding the Fourth Proportional to 12,859.55, 19,290.75 and 4,092.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.55 : 19,290.75 = 4,092.43 : x
2. Step 2: Convert to fraction form
   12,859.55/19,290.75 = 4,092.43/x
3. Step 3: Cross multiply
   12,859.55x = 19,290.75 × 4,092.43
4. Step 4: Simplify right side
   12,859.55x = 78,945,947.57
5. Step 5: Solve for x
   x = 78,945,947.57/12,859.55
6. Step 6: Final answer
   x = 6,139.09