Finding the Fourth Proportional to 16,910.57, 23,336.30 and 9,356.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,910.57 : 23,336.30 = 9,356.76 : x
2. Step 2: Convert to fraction form
   16,910.57/23,336.30 = 9,356.76/x
3. Step 3: Cross multiply
   16,910.57x = 23,336.30 × 9,356.76
4. Step 4: Simplify right side
   16,910.57x = 218,352,111.60
5. Step 5: Solve for x
   x = 218,352,111.60/16,910.57
6. Step 6: Final answer
   x = 12,912.17