Finding the Fourth Proportional to 22,387.56, 30,892.95 and 12,956.73

Step by Step Solution

1. Step 1: Write the proportion equation
   22,387.56 : 30,892.95 = 12,956.73 : x
2. Step 2: Convert to fraction form
   22,387.56/30,892.95 = 12,956.73/x
3. Step 3: Cross multiply
   22,387.56x = 30,892.95 × 12,956.73
4. Step 4: Simplify right side
   22,387.56x = 400,271,612.05
5. Step 5: Solve for x
   x = 400,271,612.05/22,387.56
6. Step 6: Final answer
   x = 17,879.20