Finding the Fourth Proportional to 11,022.16, 15,210.72 and 5,986.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,022.16 : 15,210.72 = 5,986.40 : x
2. Step 2: Convert to fraction form
   11,022.16/15,210.72 = 5,986.40/x
3. Step 3: Cross multiply
   11,022.16x = 15,210.72 × 5,986.40
4. Step 4: Simplify right side
   11,022.16x = 91,057,454.21
5. Step 5: Solve for x
   x = 91,057,454.21/11,022.16
6. Step 6: Final answer
   x = 8,261.31