Finding the Fourth Proportional to 8,679.89, 11,978.37 and 4,851.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,679.89 : 11,978.37 = 4,851.38 : x
2. Step 2: Convert to fraction form
   8,679.89/11,978.37 = 4,851.38/x
3. Step 3: Cross multiply
   8,679.89x = 11,978.37 × 4,851.38
4. Step 4: Simplify right side
   8,679.89x = 58,111,578.12
5. Step 5: Solve for x
   x = 58,111,578.12/8,679.89
6. Step 6: Final answer
   x = 6,694.97