Finding the Fourth Proportional to 11,979.10, 17,969.58 and 4,079.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,979.10 : 17,969.58 = 4,079.18 : x
2. Step 2: Convert to fraction form
   11,979.10/17,969.58 = 4,079.18/x
3. Step 3: Cross multiply
   11,979.10x = 17,969.58 × 4,079.18
4. Step 4: Simplify right side
   11,979.10x = 73,301,151.34
5. Step 5: Solve for x
   x = 73,301,151.34/11,979.10
6. Step 6: Final answer
   x = 6,119.09