Finding the Fourth Proportional to 8,993.18, 12,408.48 and 5,456.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,993.18 : 12,408.48 = 5,456.30 : x
2. Step 2: Convert to fraction form
   8,993.18/12,408.48 = 5,456.30/x
3. Step 3: Cross multiply
   8,993.18x = 12,408.48 × 5,456.30
4. Step 4: Simplify right side
   8,993.18x = 67,704,389.42
5. Step 5: Solve for x
   x = 67,704,389.42/8,993.18
6. Step 6: Final answer
   x = 7,528.41