Finding the Fourth Proportional to 8,721.90, 12,034.83 and 5,738.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,721.90 : 12,034.83 = 5,738.94 : x
2. Step 2: Convert to fraction form
   8,721.90/12,034.83 = 5,738.94/x
3. Step 3: Cross multiply
   8,721.90x = 12,034.83 × 5,738.94
4. Step 4: Simplify right side
   8,721.90x = 69,067,167.28
5. Step 5: Solve for x
   x = 69,067,167.28/8,721.90
6. Step 6: Final answer
   x = 7,918.82