Finding the Fourth Proportional to 6,221.39, 8,586.78 and 3,570.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,221.39 : 8,586.78 = 3,570.62 : x
2. Step 2: Convert to fraction form
   6,221.39/8,586.78 = 3,570.62/x
3. Step 3: Cross multiply
   6,221.39x = 8,586.78 × 3,570.62
4. Step 4: Simplify right side
   6,221.39x = 30,660,128.40
5. Step 5: Solve for x
   x = 30,660,128.40/6,221.39
6. Step 6: Final answer
   x = 4,928.18