Finding the Fourth Proportional to 12,839.73, 19,240.65 and 5,821.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.73 : 19,240.65 = 5,821.89 : x
2. Step 2: Convert to fraction form
   12,839.73/19,240.65 = 5,821.89/x
3. Step 3: Cross multiply
   12,839.73x = 19,240.65 × 5,821.89
4. Step 4: Simplify right side
   12,839.73x = 112,016,947.83
5. Step 5: Solve for x
   x = 112,016,947.83/12,839.73
6. Step 6: Final answer
   x = 8,724.24