Finding the Fourth Proportional to 11,959.10, 17,939.56 and 3,639.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,959.10 : 17,939.56 = 3,639.83 : x
2. Step 2: Convert to fraction form
   11,959.10/17,939.56 = 3,639.83/x
3. Step 3: Cross multiply
   11,959.10x = 17,939.56 × 3,639.83
4. Step 4: Simplify right side
   11,959.10x = 65,296,856.70
5. Step 5: Solve for x
   x = 65,296,856.70/11,959.10
6. Step 6: Final answer
   x = 5,460.01