Finding the Fourth Proportional to 11,017, 16,499.58 and 8,425

Step by Step Solution

1. Step 1: Write the proportion equation
   11,017 : 16,499.58 = 8,425 : x
2. Step 2: Convert to fraction form
   11,017/16,499.58 = 8,425/x
3. Step 3: Cross multiply
   11,017x = 16,499.58 × 8,425
4. Step 4: Simplify right side
   11,017x = 139,008,961.50
5. Step 5: Solve for x
   x = 139,008,961.50/11,017
6. Step 6: Final answer
   x = 12,617.68