Finding the Fourth Proportional to 14,478.62, 19,978.81 and 8,105.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,478.62 : 19,978.81 = 8,105.56 : x
2. Step 2: Convert to fraction form
   14,478.62/19,978.81 = 8,105.56/x
3. Step 3: Cross multiply
   14,478.62x = 19,978.81 × 8,105.56
4. Step 4: Simplify right side
   14,478.62x = 161,939,402.66
5. Step 5: Solve for x
   x = 161,939,402.66/14,478.62
6. Step 6: Final answer
   x = 11,184.73