Finding the Fourth Proportional to 11,960.14, 17,940.89 and 3,640.43

Step by Step Solution

1. Step 1: Write the proportion equation
   11,960.14 : 17,940.89 = 3,640.43 : x
2. Step 2: Convert to fraction form
   11,960.14/17,940.89 = 3,640.43/x
3. Step 3: Cross multiply
   11,960.14x = 17,940.89 × 3,640.43
4. Step 4: Simplify right side
   11,960.14x = 65,312,446.28
5. Step 5: Solve for x
   x = 65,312,446.28/11,960.14
6. Step 6: Final answer
   x = 5,460.84