Finding the Fourth Proportional to 6,627.69, 9,936.09 and 3,115.98

Step by Step Solution

1. Step 1: Write the proportion equation
   6,627.69 : 9,936.09 = 3,115.98 : x
2. Step 2: Convert to fraction form
   6,627.69/9,936.09 = 3,115.98/x
3. Step 3: Cross multiply
   6,627.69x = 9,936.09 × 3,115.98
4. Step 4: Simplify right side
   6,627.69x = 30,960,657.72
5. Step 5: Solve for x
   x = 30,960,657.72/6,627.69
6. Step 6: Final answer
   x = 4,671.41