Finding the Fourth Proportional to 16,997.69, 23,443.86 and 15,085.51

Step by Step Solution

1. Step 1: Write the proportion equation
   16,997.69 : 23,443.86 = 15,085.51 : x
2. Step 2: Convert to fraction form
   16,997.69/23,443.86 = 15,085.51/x
3. Step 3: Cross multiply
   16,997.69x = 23,443.86 × 15,085.51
4. Step 4: Simplify right side
   16,997.69x = 353,662,584.47
5. Step 5: Solve for x
   x = 353,662,584.47/16,997.69
6. Step 6: Final answer
   x = 20,806.51