Finding the Fourth Proportional to 11,959.94, 17,940.54 and 3,639.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,959.94 : 17,940.54 = 3,639.32 : x
2. Step 2: Convert to fraction form
   11,959.94/17,940.54 = 3,639.32/x
3. Step 3: Cross multiply
   11,959.94x = 17,940.54 × 3,639.32
4. Step 4: Simplify right side
   11,959.94x = 65,291,276.33
5. Step 5: Solve for x
   x = 65,291,276.33/11,959.94
6. Step 6: Final answer
   x = 5,459.17