Finding the Fourth Proportional to 16,421.05, 22,661.61 and 9,712.43

Step by Step Solution

1. Step 1: Write the proportion equation
   16,421.05 : 22,661.61 = 9,712.43 : x
2. Step 2: Convert to fraction form
   16,421.05/22,661.61 = 9,712.43/x
3. Step 3: Cross multiply
   16,421.05x = 22,661.61 × 9,712.43
4. Step 4: Simplify right side
   16,421.05x = 220,099,300.81
5. Step 5: Solve for x
   x = 220,099,300.81/16,421.05
6. Step 6: Final answer
   x = 13,403.49