Finding the Fourth Proportional to 9,408.56, 12,983.60 and 5,429.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.56 : 12,983.60 = 5,429.56 : x
2. Step 2: Convert to fraction form
   9,408.56/12,983.60 = 5,429.56/x
3. Step 3: Cross multiply
   9,408.56x = 12,983.60 × 5,429.56
4. Step 4: Simplify right side
   9,408.56x = 70,495,235.22
5. Step 5: Solve for x
   x = 70,495,235.22/9,408.56
6. Step 6: Final answer
   x = 7,492.67