Finding the Fourth Proportional to 16,769.59, 23,140.92 and 9,215.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,769.59 : 23,140.92 = 9,215.76 : x
2. Step 2: Convert to fraction form
   16,769.59/23,140.92 = 9,215.76/x
3. Step 3: Cross multiply
   16,769.59x = 23,140.92 × 9,215.76
4. Step 4: Simplify right side
   16,769.59x = 213,261,214.82
5. Step 5: Solve for x
   x = 213,261,214.82/16,769.59
6. Step 6: Final answer
   x = 12,717.14