Finding the Fourth Proportional to 8,387.18, 12,577.89 and 3,194.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,387.18 : 12,577.89 = 3,194.54 : x
2. Step 2: Convert to fraction form
   8,387.18/12,577.89 = 3,194.54/x
3. Step 3: Cross multiply
   8,387.18x = 12,577.89 × 3,194.54
4. Step 4: Simplify right side
   8,387.18x = 40,180,572.72
5. Step 5: Solve for x
   x = 40,180,572.72/8,387.18
6. Step 6: Final answer
   x = 4,790.71