Finding the Fourth Proportional to 20,302.72, 30,457.68 and 7,162.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,302.72 : 30,457.68 = 7,162.72 : x
2. Step 2: Convert to fraction form
   20,302.72/30,457.68 = 7,162.72/x
3. Step 3: Cross multiply
   20,302.72x = 30,457.68 × 7,162.72
4. Step 4: Simplify right side
   20,302.72x = 218,159,833.69
5. Step 5: Solve for x
   x = 218,159,833.69/20,302.72
6. Step 6: Final answer
   x = 10,745.35