Finding the Fourth Proportional to 21,451.62, 31,996.56 and 20,795.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,451.62 : 31,996.56 = 20,795.52 : x
2. Step 2: Convert to fraction form
   21,451.62/31,996.56 = 20,795.52/x
3. Step 3: Cross multiply
   21,451.62x = 31,996.56 × 20,795.52
4. Step 4: Simplify right side
   21,451.62x = 665,385,103.41
5. Step 5: Solve for x
   x = 665,385,103.41/21,451.62
6. Step 6: Final answer
   x = 31,017.94