Finding the Fourth Proportional to 8,380.06, 12,571.71 and 3,185.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,380.06 : 12,571.71 = 3,185.53 : x
2. Step 2: Convert to fraction form
   8,380.06/12,571.71 = 3,185.53/x
3. Step 3: Cross multiply
   8,380.06x = 12,571.71 × 3,185.53
4. Step 4: Simplify right side
   8,380.06x = 40,047,587.02
5. Step 5: Solve for x
   x = 40,047,587.02/8,380.06
6. Step 6: Final answer
   x = 4,778.91