Finding the Fourth Proportional to 22,940.73, 31,660.61 and 12,871.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,940.73 : 31,660.61 = 12,871.89 : x
2. Step 2: Convert to fraction form
   22,940.73/31,660.61 = 12,871.89/x
3. Step 3: Cross multiply
   22,940.73x = 31,660.61 × 12,871.89
4. Step 4: Simplify right side
   22,940.73x = 407,531,824.89
5. Step 5: Solve for x
   x = 407,531,824.89/22,940.73
6. Step 6: Final answer
   x = 17,764.55