Finding the Fourth Proportional to 14,478.67, 19,981.56 and 8,105.86

Step by Step Solution

1. Step 1: Write the proportion equation
   14,478.67 : 19,981.56 = 8,105.86 : x
2. Step 2: Convert to fraction form
   14,478.67/19,981.56 = 8,105.86/x
3. Step 3: Cross multiply
   14,478.67x = 19,981.56 × 8,105.86
4. Step 4: Simplify right side
   14,478.67x = 161,967,727.94
5. Step 5: Solve for x
   x = 161,967,727.94/14,478.67
6. Step 6: Final answer
   x = 11,186.64