Finding the Fourth Proportional to 22,629.71, 31,227.89 and 12,557.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,629.71 : 31,227.89 = 12,557.36 : x
2. Step 2: Convert to fraction form
   22,629.71/31,227.89 = 12,557.36/x
3. Step 3: Cross multiply
   22,629.71x = 31,227.89 × 12,557.36
4. Step 4: Simplify right side
   22,629.71x = 392,139,637.84
5. Step 5: Solve for x
   x = 392,139,637.84/22,629.71
6. Step 6: Final answer
   x = 17,328.54