Finding the Fourth Proportional to 12,386.39, 18,571.67 and 8,164.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.39 : 18,571.67 = 8,164.76 : x
2. Step 2: Convert to fraction form
   12,386.39/18,571.67 = 8,164.76/x
3. Step 3: Cross multiply
   12,386.39x = 18,571.67 × 8,164.76
4. Step 4: Simplify right side
   12,386.39x = 151,633,228.35
5. Step 5: Solve for x
   x = 151,633,228.35/12,386.39
6. Step 6: Final answer
   x = 12,241.93