Finding the Fourth Proportional to 22,501.72, 31,052.34 and 12,942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,501.72 : 31,052.34 = 12,942.28 : x
2. Step 2: Convert to fraction form
   22,501.72/31,052.34 = 12,942.28/x
3. Step 3: Cross multiply
   22,501.72x = 31,052.34 × 12,942.28
4. Step 4: Simplify right side
   22,501.72x = 401,888,078.94
5. Step 5: Solve for x
   x = 401,888,078.94/22,501.72
6. Step 6: Final answer
   x = 17,860.33