Finding the Fourth Proportional to 11,905, 16,406.25 and 8,719.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,905 : 16,406.25 = 8,719.27 : x
2. Step 2: Convert to fraction form
   11,905/16,406.25 = 8,719.27/x
3. Step 3: Cross multiply
   11,905x = 16,406.25 × 8,719.27
4. Step 4: Simplify right side
   11,905x = 143,050,523.44
5. Step 5: Solve for x
   x = 143,050,523.44/11,905
6. Step 6: Final answer
   x = 12,016.00