Finding the Fourth Proportional to 14,842.98, 20,483.55 and 8,128.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,842.98 : 20,483.55 = 8,128.89 : x
2. Step 2: Convert to fraction form
   14,842.98/20,483.55 = 8,128.89/x
3. Step 3: Cross multiply
   14,842.98x = 20,483.55 × 8,128.89
4. Step 4: Simplify right side
   14,842.98x = 166,508,524.76
5. Step 5: Solve for x
   x = 166,508,524.76/14,842.98
6. Step 6: Final answer
   x = 11,218.00