Finding the Fourth Proportional to 10,424.83, 14,408.76 and 9,221.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,424.83 : 14,408.76 = 9,221.30 : x
2. Step 2: Convert to fraction form
   10,424.83/14,408.76 = 9,221.30/x
3. Step 3: Cross multiply
   10,424.83x = 14,408.76 × 9,221.30
4. Step 4: Simplify right side
   10,424.83x = 132,867,534.61
5. Step 5: Solve for x
   x = 132,867,534.61/10,424.83
6. Step 6: Final answer
   x = 12,745.30