Finding the Fourth Proportional to 22,558.73, 31,128.30 and 13,001.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,558.73 : 31,128.30 = 13,001.71 : x
2. Step 2: Convert to fraction form
   22,558.73/31,128.30 = 13,001.71/x
3. Step 3: Cross multiply
   22,558.73x = 31,128.30 × 13,001.71
4. Step 4: Simplify right side
   22,558.73x = 404,721,064.38
5. Step 5: Solve for x
   x = 404,721,064.38/22,558.73
6. Step 6: Final answer
   x = 17,940.77