Finding the Fourth Proportional to 8,104.05, 12,159.72 and 4,988.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,104.05 : 12,159.72 = 4,988.79 : x
2. Step 2: Convert to fraction form
   8,104.05/12,159.72 = 4,988.79/x
3. Step 3: Cross multiply
   8,104.05x = 12,159.72 × 4,988.79
4. Step 4: Simplify right side
   8,104.05x = 60,662,289.54
5. Step 5: Solve for x
   x = 60,662,289.54/8,104.05
6. Step 6: Final answer
   x = 7,485.43