Finding the Fourth Proportional to 8,667.72, 11,962.56 and 5,686.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.72 : 11,962.56 = 5,686.08 : x
2. Step 2: Convert to fraction form
   8,667.72/11,962.56 = 5,686.08/x
3. Step 3: Cross multiply
   8,667.72x = 11,962.56 × 5,686.08
4. Step 4: Simplify right side
   8,667.72x = 68,020,073.16
5. Step 5: Solve for x
   x = 68,020,073.16/8,667.72
6. Step 6: Final answer
   x = 7,847.52