Finding the Fourth Proportional to 9,408.96, 12,983.90 and 5,429.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.96 : 12,983.90 = 5,429.84 : x
2. Step 2: Convert to fraction form
   9,408.96/12,983.90 = 5,429.84/x
3. Step 3: Cross multiply
   9,408.96x = 12,983.90 × 5,429.84
4. Step 4: Simplify right side
   9,408.96x = 70,500,407.51
5. Step 5: Solve for x
   x = 70,500,407.51/9,408.96
6. Step 6: Final answer
   x = 7,492.90