Finding the Fourth Proportional to 20,365.34, 28,105.98 and 11,867

Step by Step Solution

1. Step 1: Write the proportion equation
   20,365.34 : 28,105.98 = 11,867 : x
2. Step 2: Convert to fraction form
   20,365.34/28,105.98 = 11,867/x
3. Step 3: Cross multiply
   20,365.34x = 28,105.98 × 11,867
4. Step 4: Simplify right side
   20,365.34x = 333,533,664.66
5. Step 5: Solve for x
   x = 333,533,664.66/20,365.34
6. Step 6: Final answer
   x = 16,377.52