Finding the Fourth Proportional to 8,083.68, 12,059.16 and 7,209.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,083.68 : 12,059.16 = 7,209.12 : x
2. Step 2: Convert to fraction form
   8,083.68/12,059.16 = 7,209.12/x
3. Step 3: Cross multiply
   8,083.68x = 12,059.16 × 7,209.12
4. Step 4: Simplify right side
   8,083.68x = 86,935,931.54
5. Step 5: Solve for x
   x = 86,935,931.54/8,083.68
6. Step 6: Final answer
   x = 10,754.50