Finding the Fourth Proportional to 12,377.67, 18,571.37 and 5,447.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,377.67 : 18,571.37 = 5,447.31 : x
2. Step 2: Convert to fraction form
   12,377.67/18,571.37 = 5,447.31/x
3. Step 3: Cross multiply
   12,377.67x = 18,571.37 × 5,447.31
4. Step 4: Simplify right side
   12,377.67x = 101,164,009.51
5. Step 5: Solve for x
   x = 101,164,009.51/12,377.67
6. Step 6: Final answer
   x = 8,173.11