Finding the Fourth Proportional to 21,150.24, 31,725.59 and 8,667.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.24 : 31,725.59 = 8,667.06 : x
2. Step 2: Convert to fraction form
   21,150.24/31,725.59 = 8,667.06/x
3. Step 3: Cross multiply
   21,150.24x = 31,725.59 × 8,667.06
4. Step 4: Simplify right side
   21,150.24x = 274,967,548.73
5. Step 5: Solve for x
   x = 274,967,548.73/21,150.24
6. Step 6: Final answer
   x = 13,000.68