Finding the Fourth Proportional to 20,667.96, 31,003.98 and 6,624.45

Step by Step Solution

1. Step 1: Write the proportion equation
   20,667.96 : 31,003.98 = 6,624.45 : x
2. Step 2: Convert to fraction form
   20,667.96/31,003.98 = 6,624.45/x
3. Step 3: Cross multiply
   20,667.96x = 31,003.98 × 6,624.45
4. Step 4: Simplify right side
   20,667.96x = 205,384,315.31
5. Step 5: Solve for x
   x = 205,384,315.31/20,667.96
6. Step 6: Final answer
   x = 9,937.33