Finding the Fourth Proportional to 22,581.41, 31,162.25 and 13,021.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,581.41 : 31,162.25 = 13,021.25 : x
2. Step 2: Convert to fraction form
   22,581.41/31,162.25 = 13,021.25/x
3. Step 3: Cross multiply
   22,581.41x = 31,162.25 × 13,021.25
4. Step 4: Simplify right side
   22,581.41x = 405,771,382.71
5. Step 5: Solve for x
   x = 405,771,382.71/22,581.41
6. Step 6: Final answer
   x = 17,969.27