Finding the Fourth Proportional to 11,986.27, 17,979.57 and 4,591.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,986.27 : 17,979.57 = 4,591.10 : x
2. Step 2: Convert to fraction form
   11,986.27/17,979.57 = 4,591.10/x
3. Step 3: Cross multiply
   11,986.27x = 17,979.57 × 4,591.10
4. Step 4: Simplify right side
   11,986.27x = 82,546,048.78
5. Step 5: Solve for x
   x = 82,546,048.78/11,986.27
6. Step 6: Final answer
   x = 6,886.72