Finding the Fourth Proportional to 6,613.48, 9,910.98 and 3,099.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.48 : 9,910.98 = 3,099.72 : x
2. Step 2: Convert to fraction form
   6,613.48/9,910.98 = 3,099.72/x
3. Step 3: Cross multiply
   6,613.48x = 9,910.98 × 3,099.72
4. Step 4: Simplify right side
   6,613.48x = 30,721,262.93
5. Step 5: Solve for x
   x = 30,721,262.93/6,613.48
6. Step 6: Final answer
   x = 4,645.25