Finding the Fourth Proportional to 14,479.76, 19,980.60 and 8,105.94

Step by Step Solution

1. Step 1: Write the proportion equation
   14,479.76 : 19,980.60 = 8,105.94 : x
2. Step 2: Convert to fraction form
   14,479.76/19,980.60 = 8,105.94/x
3. Step 3: Cross multiply
   14,479.76x = 19,980.60 × 8,105.94
4. Step 4: Simplify right side
   14,479.76x = 161,961,444.86
5. Step 5: Solve for x
   x = 161,961,444.86/14,479.76
6. Step 6: Final answer
   x = 11,185.37