Finding the Fourth Proportional to 8,182.61, 12,280.04 and 3,185.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,182.61 : 12,280.04 = 3,185.78 : x
2. Step 2: Convert to fraction form
   8,182.61/12,280.04 = 3,185.78/x
3. Step 3: Cross multiply
   8,182.61x = 12,280.04 × 3,185.78
4. Step 4: Simplify right side
   8,182.61x = 39,121,428.50
5. Step 5: Solve for x
   x = 39,121,428.50/8,182.61
6. Step 6: Final answer
   x = 4,781.05