Finding the Fourth Proportional to 9,408.04, 12,983.86 and 5,216.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.04 : 12,983.86 = 5,216.20 : x
2. Step 2: Convert to fraction form
   9,408.04/12,983.86 = 5,216.20/x
3. Step 3: Cross multiply
   9,408.04x = 12,983.86 × 5,216.20
4. Step 4: Simplify right side
   9,408.04x = 67,726,410.53
5. Step 5: Solve for x
   x = 67,726,410.53/9,408.04
6. Step 6: Final answer
   x = 7,198.78