Finding the Fourth Proportional to 7,105.20, 10,605.18 and 6,667.44

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.20 : 10,605.18 = 6,667.44 : x
2. Step 2: Convert to fraction form
   7,105.20/10,605.18 = 6,667.44/x
3. Step 3: Cross multiply
   7,105.20x = 10,605.18 × 6,667.44
4. Step 4: Simplify right side
   7,105.20x = 70,709,401.34
5. Step 5: Solve for x
   x = 70,709,401.34/7,105.20
6. Step 6: Final answer
   x = 9,951.78