Finding the Fourth Proportional to 11,021.74, 15,209.91 and 5,986.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,021.74 : 15,209.91 = 5,986.09 : x
2. Step 2: Convert to fraction form
   11,021.74/15,209.91 = 5,986.09/x
3. Step 3: Cross multiply
   11,021.74x = 15,209.91 × 5,986.09
4. Step 4: Simplify right side
   11,021.74x = 91,047,890.15
5. Step 5: Solve for x
   x = 91,047,890.15/11,021.74
6. Step 6: Final answer
   x = 8,260.75