Finding the Fourth Proportional to 10,991.41, 16,469.83 and 8,498.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.41 : 16,469.83 = 8,498.69 : x
2. Step 2: Convert to fraction form
   10,991.41/16,469.83 = 8,498.69/x
3. Step 3: Cross multiply
   10,991.41x = 16,469.83 × 8,498.69
4. Step 4: Simplify right side
   10,991.41x = 139,971,937.69
5. Step 5: Solve for x
   x = 139,971,937.69/10,991.41
6. Step 6: Final answer
   x = 12,734.66