Finding the Fourth Proportional to 6,615.48, 9,913.98 and 3,101.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,615.48 : 9,913.98 = 3,101.72 : x
2. Step 2: Convert to fraction form
   6,615.48/9,913.98 = 3,101.72/x
3. Step 3: Cross multiply
   6,615.48x = 9,913.98 × 3,101.72
4. Step 4: Simplify right side
   6,615.48x = 30,750,390.05
5. Step 5: Solve for x
   x = 30,750,390.05/6,615.48
6. Step 6: Final answer
   x = 4,648.25