Finding the Fourth Proportional to 20,819.84, 31,304.68 and 19,196.24

Step by Step Solution

1. Step 1: Write the proportion equation
   20,819.84 : 31,304.68 = 19,196.24 : x
2. Step 2: Convert to fraction form
   20,819.84/31,304.68 = 19,196.24/x
3. Step 3: Cross multiply
   20,819.84x = 31,304.68 × 19,196.24
4. Step 4: Simplify right side
   20,819.84x = 600,932,150.40
5. Step 5: Solve for x
   x = 600,932,150.40/20,819.84
6. Step 6: Final answer
   x = 28,863.44