Finding the Fourth Proportional to 16,639, 22,961.82 and 9,187.48

Step by Step Solution

1. Step 1: Write the proportion equation
   16,639 : 22,961.82 = 9,187.48 : x
2. Step 2: Convert to fraction form
   16,639/22,961.82 = 9,187.48/x
3. Step 3: Cross multiply
   16,639x = 22,961.82 × 9,187.48
4. Step 4: Simplify right side
   16,639x = 210,961,262.01
5. Step 5: Solve for x
   x = 210,961,262.01/16,639
6. Step 6: Final answer
   x = 12,678.72