Finding the Fourth Proportional to 23,028.43, 31,781.07 and 12,956.27

Step by Step Solution

1. Step 1: Write the proportion equation
   23,028.43 : 31,781.07 = 12,956.27 : x
2. Step 2: Convert to fraction form
   23,028.43/31,781.07 = 12,956.27/x
3. Step 3: Cross multiply
   23,028.43x = 31,781.07 × 12,956.27
4. Step 4: Simplify right side
   23,028.43x = 411,764,123.81
5. Step 5: Solve for x
   x = 411,764,123.81/23,028.43
6. Step 6: Final answer
   x = 17,880.69