Finding the Fourth Proportional to 12,809.61, 19,216.83 and 5,789.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.61 : 19,216.83 = 5,789.54 : x
2. Step 2: Convert to fraction form
   12,809.61/19,216.83 = 5,789.54/x
3. Step 3: Cross multiply
   12,809.61x = 19,216.83 × 5,789.54
4. Step 4: Simplify right side
   12,809.61x = 111,256,605.96
5. Step 5: Solve for x
   x = 111,256,605.96/12,809.61
6. Step 6: Final answer
   x = 8,685.40