Finding the Fourth Proportional to 14,978.04, 20,769.42 and 14,479.88

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.04 : 20,769.42 = 14,479.88 : x
2. Step 2: Convert to fraction form
   14,978.04/20,769.42 = 14,479.88/x
3. Step 3: Cross multiply
   14,978.04x = 20,769.42 × 14,479.88
4. Step 4: Simplify right side
   14,978.04x = 300,738,709.27
5. Step 5: Solve for x
   x = 300,738,709.27/14,978.04
6. Step 6: Final answer
   x = 20,078.64