Finding the Fourth Proportional to 22,756.41, 31,417.31 and 20,231.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,756.41 : 31,417.31 = 20,231.54 : x
2. Step 2: Convert to fraction form
   22,756.41/31,417.31 = 20,231.54/x
3. Step 3: Cross multiply
   22,756.41x = 31,417.31 × 20,231.54
4. Step 4: Simplify right side
   22,756.41x = 635,620,563.96
5. Step 5: Solve for x
   x = 635,620,563.96/22,756.41
6. Step 6: Final answer
   x = 27,931.50