Finding the Fourth Proportional to 20,667.72, 30,983.34 and 7,517.79

Step by Step Solution

1. Step 1: Write the proportion equation
   20,667.72 : 30,983.34 = 7,517.79 : x
2. Step 2: Convert to fraction form
   20,667.72/30,983.34 = 7,517.79/x
3. Step 3: Cross multiply
   20,667.72x = 30,983.34 × 7,517.79
4. Step 4: Simplify right side
   20,667.72x = 232,926,243.62
5. Step 5: Solve for x
   x = 232,926,243.62/20,667.72
6. Step 6: Final answer
   x = 11,270.05