Finding the Fourth Proportional to 20,667.69, 31,003.57 and 6,624.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,667.69 : 31,003.57 = 6,624.18 : x
2. Step 2: Convert to fraction form
   20,667.69/31,003.57 = 6,624.18/x
3. Step 3: Cross multiply
   20,667.69x = 31,003.57 × 6,624.18
4. Step 4: Simplify right side
   20,667.69x = 205,373,073.30
5. Step 5: Solve for x
   x = 205,373,073.30/20,667.69
6. Step 6: Final answer
   x = 9,936.92