Finding the Fourth Proportional to 16,892.15, 23,309.98 and 9,721.62

Step by Step Solution

1. Step 1: Write the proportion equation
   16,892.15 : 23,309.98 = 9,721.62 : x
2. Step 2: Convert to fraction form
   16,892.15/23,309.98 = 9,721.62/x
3. Step 3: Cross multiply
   16,892.15x = 23,309.98 × 9,721.62
4. Step 4: Simplify right side
   16,892.15x = 226,610,743.46
5. Step 5: Solve for x
   x = 226,610,743.46/16,892.15
6. Step 6: Final answer
   x = 13,415.16