Finding the Fourth Proportional to 16,978.92, 23,414.58 and 13,196.67

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.92 : 23,414.58 = 13,196.67 : x
2. Step 2: Convert to fraction form
   16,978.92/23,414.58 = 13,196.67/x
3. Step 3: Cross multiply
   16,978.92x = 23,414.58 × 13,196.67
4. Step 4: Simplify right side
   16,978.92x = 308,994,485.45
5. Step 5: Solve for x
   x = 308,994,485.45/16,978.92
6. Step 6: Final answer
   x = 18,198.71