Finding the Fourth Proportional to 14,421.72, 19,873.98 and 9,636.24

Step by Step Solution

1. Step 1: Write the proportion equation
   14,421.72 : 19,873.98 = 9,636.24 : x
2. Step 2: Convert to fraction form
   14,421.72/19,873.98 = 9,636.24/x
3. Step 3: Cross multiply
   14,421.72x = 19,873.98 × 9,636.24
4. Step 4: Simplify right side
   14,421.72x = 191,510,441.04
5. Step 5: Solve for x
   x = 191,510,441.04/14,421.72
6. Step 6: Final answer
   x = 13,279.31