Finding the Fourth Proportional to 14,978.42, 20,667.62 and 9,605.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.42 : 20,667.62 = 9,605.56 : x
2. Step 2: Convert to fraction form
   14,978.42/20,667.62 = 9,605.56/x
3. Step 3: Cross multiply
   14,978.42x = 20,667.62 × 9,605.56
4. Step 4: Simplify right side
   14,978.42x = 198,524,063.97
5. Step 5: Solve for x
   x = 198,524,063.97/14,978.42
6. Step 6: Final answer
   x = 13,254.01