Finding the Fourth Proportional to 16,421.12, 22,663.72 and 10,446.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,421.12 : 22,663.72 = 10,446.56 : x
2. Step 2: Convert to fraction form
   16,421.12/22,663.72 = 10,446.56/x
3. Step 3: Cross multiply
   16,421.12x = 22,663.72 × 10,446.56
4. Step 4: Simplify right side
   16,421.12x = 236,757,910.80
5. Step 5: Solve for x
   x = 236,757,910.80/16,421.12
6. Step 6: Final answer
   x = 14,417.89