Finding the Fourth Proportional to 14,945.82, 20,623.32 and 8,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,945.82 : 20,623.32 = 8,978.56 : x
2. Step 2: Convert to fraction form
   14,945.82/20,623.32 = 8,978.56/x
3. Step 3: Cross multiply
   14,945.82x = 20,623.32 × 8,978.56
4. Step 4: Simplify right side
   14,945.82x = 185,167,716.02
5. Step 5: Solve for x
   x = 185,167,716.02/14,945.82
6. Step 6: Final answer
   x = 12,389.26