Finding the Fourth Proportional to 22,307.05, 30,786.33 and 12,748.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,307.05 : 30,786.33 = 12,748.48 : x
2. Step 2: Convert to fraction form
   22,307.05/30,786.33 = 12,748.48/x
3. Step 3: Cross multiply
   22,307.05x = 30,786.33 × 12,748.48
4. Step 4: Simplify right side
   22,307.05x = 392,478,912.28
5. Step 5: Solve for x
   x = 392,478,912.28/22,307.05
6. Step 6: Final answer
   x = 17,594.39