Finding the Fourth Proportional to 16,842.29, 23,243.69 and 9,289.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,842.29 : 23,243.69 = 9,289.31 : x
2. Step 2: Convert to fraction form
   16,842.29/23,243.69 = 9,289.31/x
3. Step 3: Cross multiply
   16,842.29x = 23,243.69 × 9,289.31
4. Step 4: Simplify right side
   16,842.29x = 215,917,841.95
5. Step 5: Solve for x
   x = 215,917,841.95/16,842.29
6. Step 6: Final answer
   x = 12,819.98