Finding the Fourth Proportional to 22,802.20, 31,463.98 and 12,729.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,802.20 : 31,463.98 = 12,729.18 : x
2. Step 2: Convert to fraction form
   22,802.20/31,463.98 = 12,729.18/x
3. Step 3: Cross multiply
   22,802.20x = 31,463.98 × 12,729.18
4. Step 4: Simplify right side
   22,802.20x = 400,510,664.94
5. Step 5: Solve for x
   x = 400,510,664.94/22,802.20
6. Step 6: Final answer
   x = 17,564.56