Finding the Fourth Proportional to 13,921.69, 20,854.71 and 8,371.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,921.69 : 20,854.71 = 8,371.98 : x
2. Step 2: Convert to fraction form
   13,921.69/20,854.71 = 8,371.98/x
3. Step 3: Cross multiply
   13,921.69x = 20,854.71 × 8,371.98
4. Step 4: Simplify right side
   13,921.69x = 174,595,215.03
5. Step 5: Solve for x
   x = 174,595,215.03/13,921.69
6. Step 6: Final answer
   x = 12,541.24