Finding the Fourth Proportional to 20,788.74, 31,104.49 and 12,754.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,788.74 : 31,104.49 = 12,754.82 : x
2. Step 2: Convert to fraction form
   20,788.74/31,104.49 = 12,754.82/x
3. Step 3: Cross multiply
   20,788.74x = 31,104.49 × 12,754.82
4. Step 4: Simplify right side
   20,788.74x = 396,732,171.14
5. Step 5: Solve for x
   x = 396,732,171.14/20,788.74
6. Step 6: Final answer
   x = 19,083.99