Finding the Fourth Proportional to 16,812.72, 23,200.92 and 9,360.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,812.72 : 23,200.92 = 9,360.72 : x
2. Step 2: Convert to fraction form
   16,812.72/23,200.92 = 9,360.72/x
3. Step 3: Cross multiply
   16,812.72x = 23,200.92 × 9,360.72
4. Step 4: Simplify right side
   16,812.72x = 217,177,315.86
5. Step 5: Solve for x
   x = 217,177,315.86/16,812.72
6. Step 6: Final answer
   x = 12,917.44