Finding the Fourth Proportional to 8,992.05, 12,408.72 and 5,636.67

Step by Step Solution

1. Step 1: Write the proportion equation
   8,992.05 : 12,408.72 = 5,636.67 : x
2. Step 2: Convert to fraction form
   8,992.05/12,408.72 = 5,636.67/x
3. Step 3: Cross multiply
   8,992.05x = 12,408.72 × 5,636.67
4. Step 4: Simplify right side
   8,992.05x = 69,943,859.76
5. Step 5: Solve for x
   x = 69,943,859.76/8,992.05
6. Step 6: Final answer
   x = 7,778.41