Finding the Fourth Proportional to 11,959.59, 17,942.12 and 3,640.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,959.59 : 17,942.12 = 3,640.79 : x
2. Step 2: Convert to fraction form
   11,959.59/17,942.12 = 3,640.79/x
3. Step 3: Cross multiply
   11,959.59x = 17,942.12 × 3,640.79
4. Step 4: Simplify right side
   11,959.59x = 65,323,491.07
5. Step 5: Solve for x
   x = 65,323,491.07/11,959.59
6. Step 6: Final answer
   x = 5,462.02