Finding the Fourth Proportional to 22,343.02, 30,831.56 and 12,912.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,343.02 : 30,831.56 = 12,912.19 : x
2. Step 2: Convert to fraction form
   22,343.02/30,831.56 = 12,912.19/x
3. Step 3: Cross multiply
   22,343.02x = 30,831.56 × 12,912.19
4. Step 4: Simplify right side
   22,343.02x = 398,102,960.72
5. Step 5: Solve for x
   x = 398,102,960.72/22,343.02
6. Step 6: Final answer
   x = 17,817.78