Finding the Fourth Proportional to 14,842.89, 20,485.50 and 8,469.47

Step by Step Solution

1. Step 1: Write the proportion equation
   14,842.89 : 20,485.50 = 8,469.47 : x
2. Step 2: Convert to fraction form
   14,842.89/20,485.50 = 8,469.47/x
3. Step 3: Cross multiply
   14,842.89x = 20,485.50 × 8,469.47
4. Step 4: Simplify right side
   14,842.89x = 173,501,327.69
5. Step 5: Solve for x
   x = 173,501,327.69/14,842.89
6. Step 6: Final answer
   x = 11,689.19