Finding the Fourth Proportional to 6,613.55, 9,917.39 and 3,100.71

Step by Step Solution

1. Step 1: Write the proportion equation
   6,613.55 : 9,917.39 = 3,100.71 : x
2. Step 2: Convert to fraction form
   6,613.55/9,917.39 = 3,100.71/x
3. Step 3: Cross multiply
   6,613.55x = 9,917.39 × 3,100.71
4. Step 4: Simplify right side
   6,613.55x = 30,750,934.84
5. Step 5: Solve for x
   x = 30,750,934.84/6,613.55
6. Step 6: Final answer
   x = 4,649.69