Finding the Fourth Proportional to 16,910.89, 23,335.55 and 9,357.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,910.89 : 23,335.55 = 9,357.10 : x
2. Step 2: Convert to fraction form
   16,910.89/23,335.55 = 9,357.10/x
3. Step 3: Cross multiply
   16,910.89x = 23,335.55 × 9,357.10
4. Step 4: Simplify right side
   16,910.89x = 218,353,074.91
5. Step 5: Solve for x
   x = 218,353,074.91/16,910.89
6. Step 6: Final answer
   x = 12,911.98