Finding the Fourth Proportional to 11,976.42, 17,965.72 and 5,739.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,976.42 : 17,965.72 = 5,739.42 : x
2. Step 2: Convert to fraction form
   11,976.42/17,965.72 = 5,739.42/x
3. Step 3: Cross multiply
   11,976.42x = 17,965.72 × 5,739.42
4. Step 4: Simplify right side
   11,976.42x = 103,112,812.68
5. Step 5: Solve for x
   x = 103,112,812.68/11,976.42
6. Step 6: Final answer
   x = 8,609.65