Finding the Fourth Proportional to 8,518.89, 12,713.56 and 7,954.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,518.89 : 12,713.56 = 7,954.89 : x
2. Step 2: Convert to fraction form
   8,518.89/12,713.56 = 7,954.89/x
3. Step 3: Cross multiply
   8,518.89x = 12,713.56 × 7,954.89
4. Step 4: Simplify right side
   8,518.89x = 101,134,942.50
5. Step 5: Solve for x
   x = 101,134,942.50/8,518.89
6. Step 6: Final answer
   x = 11,871.84