Finding the Fourth Proportional to 17,085.09, 23,578.92 and 9,917.67

Step by Step Solution

1. Step 1: Write the proportion equation
   17,085.09 : 23,578.92 = 9,917.67 : x
2. Step 2: Convert to fraction form
   17,085.09/23,578.92 = 9,917.67/x
3. Step 3: Cross multiply
   17,085.09x = 23,578.92 × 9,917.67
4. Step 4: Simplify right side
   17,085.09x = 233,847,947.52
5. Step 5: Solve for x
   x = 233,847,947.52/17,085.09
6. Step 6: Final answer
   x = 13,687.25