Finding the Fourth Proportional to 9,408.45, 12,983.57 and 5,159.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.45 : 12,983.57 = 5,159.50 : x
2. Step 2: Convert to fraction form
   9,408.45/12,983.57 = 5,159.50/x
3. Step 3: Cross multiply
   9,408.45x = 12,983.57 × 5,159.50
4. Step 4: Simplify right side
   9,408.45x = 66,988,730.77
5. Step 5: Solve for x
   x = 66,988,730.77/9,408.45
6. Step 6: Final answer
   x = 7,120.06