Finding the Fourth Proportional to 22,580.34, 31,160.79 and 12,644.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,580.34 : 31,160.79 = 12,644.34 : x
2. Step 2: Convert to fraction form
   22,580.34/31,160.79 = 12,644.34/x
3. Step 3: Cross multiply
   22,580.34x = 31,160.79 × 12,644.34
4. Step 4: Simplify right side
   22,580.34x = 394,007,623.43
5. Step 5: Solve for x
   x = 394,007,623.43/22,580.34
6. Step 6: Final answer
   x = 17,449.14