Finding the Fourth Proportional to 23,028.05, 31,778.67 and 12,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,028.05 : 31,778.67 = 12,956.50 : x
2. Step 2: Convert to fraction form
   23,028.05/31,778.67 = 12,956.50/x
3. Step 3: Cross multiply
   23,028.05x = 31,778.67 × 12,956.50
4. Step 4: Simplify right side
   23,028.05x = 411,740,337.86
5. Step 5: Solve for x
   x = 411,740,337.86/23,028.05
6. Step 6: Final answer
   x = 17,879.95