Finding the Fourth Proportional to 14,766.34, 20,379.72 and 9,729.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,766.34 : 20,379.72 = 9,729.76 : x
2. Step 2: Convert to fraction form
   14,766.34/20,379.72 = 9,729.76/x
3. Step 3: Cross multiply
   14,766.34x = 20,379.72 × 9,729.76
4. Step 4: Simplify right side
   14,766.34x = 198,289,784.47
5. Step 5: Solve for x
   x = 198,289,784.47/14,766.34
6. Step 6: Final answer
   x = 13,428.50