Finding the Fourth Proportional to 8,667.55, 11,961.18 and 4,688.67

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.55 : 11,961.18 = 4,688.67 : x
2. Step 2: Convert to fraction form
   8,667.55/11,961.18 = 4,688.67/x
3. Step 3: Cross multiply
   8,667.55x = 11,961.18 × 4,688.67
4. Step 4: Simplify right side
   8,667.55x = 56,082,025.83
5. Step 5: Solve for x
   x = 56,082,025.83/8,667.55
6. Step 6: Final answer
   x = 6,470.34