Finding the Fourth Proportional to 6,290.05, 8,680.37 and 3,457.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,290.05 : 8,680.37 = 3,457.55 : x
2. Step 2: Convert to fraction form
   6,290.05/8,680.37 = 3,457.55/x
3. Step 3: Cross multiply
   6,290.05x = 8,680.37 × 3,457.55
4. Step 4: Simplify right side
   6,290.05x = 30,012,788.33
5. Step 5: Solve for x
   x = 30,012,788.33/6,290.05
6. Step 6: Final answer
   x = 4,771.47