Finding the Fourth Proportional to 20,784.69, 31,156.52 and 8,297.19

Step by Step Solution

1. Step 1: Write the proportion equation
   20,784.69 : 31,156.52 = 8,297.19 : x
2. Step 2: Convert to fraction form
   20,784.69/31,156.52 = 8,297.19/x
3. Step 3: Cross multiply
   20,784.69x = 31,156.52 × 8,297.19
4. Step 4: Simplify right side
   20,784.69x = 258,511,524.69
5. Step 5: Solve for x
   x = 258,511,524.69/20,784.69
6. Step 6: Final answer
   x = 12,437.59