Finding the Fourth Proportional to 11,984.59, 17,979.24 and 3,665.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,984.59 : 17,979.24 = 3,665.79 : x
2. Step 2: Convert to fraction form
   11,984.59/17,979.24 = 3,665.79/x
3. Step 3: Cross multiply
   11,984.59x = 17,979.24 × 3,665.79
4. Step 4: Simplify right side
   11,984.59x = 65,908,118.20
5. Step 5: Solve for x
   x = 65,908,118.20/11,984.59
6. Step 6: Final answer
   x = 5,499.41