Finding the Fourth Proportional to 22,256.39, 30,717.43 and 12,696.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,256.39 : 30,717.43 = 12,696.50 : x
2. Step 2: Convert to fraction form
   22,256.39/30,717.43 = 12,696.50/x
3. Step 3: Cross multiply
   22,256.39x = 30,717.43 × 12,696.50
4. Step 4: Simplify right side
   22,256.39x = 390,003,895.05
5. Step 5: Solve for x
   x = 390,003,895.05/22,256.39
6. Step 6: Final answer
   x = 17,523.23