Finding the Fourth Proportional to 6,615.69, 9,930.02 and 3,155.37

Step by Step Solution

1. Step 1: Write the proportion equation
   6,615.69 : 9,930.02 = 3,155.37 : x
2. Step 2: Convert to fraction form
   6,615.69/9,930.02 = 3,155.37/x
3. Step 3: Cross multiply
   6,615.69x = 9,930.02 × 3,155.37
4. Step 4: Simplify right side
   6,615.69x = 31,332,871.43
5. Step 5: Solve for x
   x = 31,332,871.43/6,615.69
6. Step 6: Final answer
   x = 4,736.15