Finding the Fourth Proportional to 31,033.53, 42,819.79 and 20,294.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,033.53 : 42,819.79 = 20,294.15 : x
2. Step 2: Convert to fraction form
   31,033.53/42,819.79 = 20,294.15/x
3. Step 3: Cross multiply
   31,033.53x = 42,819.79 × 20,294.15
4. Step 4: Simplify right side
   31,033.53x = 868,991,014.45
5. Step 5: Solve for x
   x = 868,991,014.45/31,033.53
6. Step 6: Final answer
   x = 28,001.68