Finding the Fourth Proportional to 12,930.30, 17,839.24 and 8,456.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930.30 : 17,839.24 = 8,456.67 : x
2. Step 2: Convert to fraction form
   12,930.30/17,839.24 = 8,456.67/x
3. Step 3: Cross multiply
   12,930.30x = 17,839.24 × 8,456.67
4. Step 4: Simplify right side
   12,930.30x = 150,860,544.59
5. Step 5: Solve for x
   x = 150,860,544.59/12,930.30
6. Step 6: Final answer
   x = 11,667.21