Finding the Fourth Proportional to 20,469.17, 30,697.22 and 7,986.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,469.17 : 30,697.22 = 7,986.15 : x
2. Step 2: Convert to fraction form
   20,469.17/30,697.22 = 7,986.15/x
3. Step 3: Cross multiply
   20,469.17x = 30,697.22 × 7,986.15
4. Step 4: Simplify right side
   20,469.17x = 245,152,563.57
5. Step 5: Solve for x
   x = 245,152,563.57/20,469.17
6. Step 6: Final answer
   x = 11,976.68