Finding the Fourth Proportional to 16,407.09, 22,638.15 and 9,688.14

Step by Step Solution

1. Step 1: Write the proportion equation
   16,407.09 : 22,638.15 = 9,688.14 : x
2. Step 2: Convert to fraction form
   16,407.09/22,638.15 = 9,688.14/x
3. Step 3: Cross multiply
   16,407.09x = 22,638.15 × 9,688.14
4. Step 4: Simplify right side
   16,407.09x = 219,321,566.54
5. Step 5: Solve for x
   x = 219,321,566.54/16,407.09
6. Step 6: Final answer
   x = 13,367.49