Finding the Fourth Proportional to 8,145.28, 12,196.77 and 6,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,145.28 : 12,196.77 = 6,982.72 : x
2. Step 2: Convert to fraction form
   8,145.28/12,196.77 = 6,982.72/x
3. Step 3: Cross multiply
   8,145.28x = 12,196.77 × 6,982.72
4. Step 4: Simplify right side
   8,145.28x = 85,166,629.81
5. Step 5: Solve for x
   x = 85,166,629.81/8,145.28
6. Step 6: Final answer
   x = 10,455.95