Finding the Fourth Proportional to 11,963.68, 17,945.47 and 3,643.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,963.68 : 17,945.47 = 3,643.40 : x
2. Step 2: Convert to fraction form
   11,963.68/17,945.47 = 3,643.40/x
3. Step 3: Cross multiply
   11,963.68x = 17,945.47 × 3,643.40
4. Step 4: Simplify right side
   11,963.68x = 65,382,561.15
5. Step 5: Solve for x
   x = 65,382,561.15/11,963.68
6. Step 6: Final answer
   x = 5,465.09