Finding the Fourth Proportional to 8,667.31, 11,960.91 and 4,688.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.31 : 11,960.91 = 4,688.42 : x
2. Step 2: Convert to fraction form
   8,667.31/11,960.91 = 4,688.42/x
3. Step 3: Cross multiply
   8,667.31x = 11,960.91 × 4,688.42
4. Step 4: Simplify right side
   8,667.31x = 56,077,769.66
5. Step 5: Solve for x
   x = 56,077,769.66/8,667.31
6. Step 6: Final answer
   x = 6,470.03