Finding the Fourth Proportional to 12,722.42, 19,085.67 and 3,959.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.42 : 19,085.67 = 3,959.36 : x
2. Step 2: Convert to fraction form
   12,722.42/19,085.67 = 3,959.36/x
3. Step 3: Cross multiply
   12,722.42x = 19,085.67 × 3,959.36
4. Step 4: Simplify right side
   12,722.42x = 75,567,038.37
5. Step 5: Solve for x
   x = 75,567,038.37/12,722.42
6. Step 6: Final answer
   x = 5,939.67