Finding the Fourth Proportional to 22,949.10, 31,668.84 and 12,879.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,949.10 : 31,668.84 = 12,879.72 : x
2. Step 2: Convert to fraction form
   22,949.10/31,668.84 = 12,879.72/x
3. Step 3: Cross multiply
   22,949.10x = 31,668.84 × 12,879.72
4. Step 4: Simplify right side
   22,949.10x = 407,885,791.92
5. Step 5: Solve for x
   x = 407,885,791.92/22,949.10
6. Step 6: Final answer
   x = 17,773.50