Finding the Fourth Proportional to 22,387.36, 30,897.56 and 12,956.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,387.36 : 30,897.56 = 12,956.52 : x
2. Step 2: Convert to fraction form
   22,387.36/30,897.56 = 12,956.52/x
3. Step 3: Cross multiply
   22,387.36x = 30,897.56 × 12,956.52
4. Step 4: Simplify right side
   22,387.36x = 400,324,854.09
5. Step 5: Solve for x
   x = 400,324,854.09/22,387.36
6. Step 6: Final answer
   x = 17,881.74