Finding the Fourth Proportional to 22,311.69, 30,782.10 and 12,744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,311.69 : 30,782.10 = 12,744.72 : x
2. Step 2: Convert to fraction form
   22,311.69/30,782.10 = 12,744.72/x
3. Step 3: Cross multiply
   22,311.69x = 30,782.10 × 12,744.72
4. Step 4: Simplify right side
   22,311.69x = 392,309,245.51
5. Step 5: Solve for x
   x = 392,309,245.51/22,311.69
6. Step 6: Final answer
   x = 17,583.13