Finding the Fourth Proportional to 31,028.27, 42,769.22 and 20,953.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.27 : 42,769.22 = 20,953.49 : x
2. Step 2: Convert to fraction form
   31,028.27/42,769.22 = 20,953.49/x
3. Step 3: Cross multiply
   31,028.27x = 42,769.22 × 20,953.49
4. Step 4: Simplify right side
   31,028.27x = 896,164,104.96
5. Step 5: Solve for x
   x = 896,164,104.96/31,028.27
6. Step 6: Final answer
   x = 28,882.19