Finding the Fourth Proportional to 14,665.42, 20,238.38 and 8,619.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,665.42 : 20,238.38 = 8,619.76 : x
2. Step 2: Convert to fraction form
   14,665.42/20,238.38 = 8,619.76/x
3. Step 3: Cross multiply
   14,665.42x = 20,238.38 × 8,619.76
4. Step 4: Simplify right side
   14,665.42x = 174,449,978.39
5. Step 5: Solve for x
   x = 174,449,978.39/14,665.42
6. Step 6: Final answer
   x = 11,895.33