Finding the Fourth Proportional to 16,313.96, 24,419.00 and 12,989.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,313.96 : 24,419.00 = 12,989.72 : x
2. Step 2: Convert to fraction form
   16,313.96/24,419.00 = 12,989.72/x
3. Step 3: Cross multiply
   16,313.96x = 24,419.00 × 12,989.72
4. Step 4: Simplify right side
   16,313.96x = 317,196,066.20
5. Step 5: Solve for x
   x = 317,196,066.20/16,313.96
6. Step 6: Final answer
   x = 19,443.23