Finding the Fourth Proportional to 22,256.42, 30,715.34 and 12,825.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,256.42 : 30,715.34 = 12,825.59 : x
2. Step 2: Convert to fraction form
   22,256.42/30,715.34 = 12,825.59/x
3. Step 3: Cross multiply
   22,256.42x = 30,715.34 × 12,825.59
4. Step 4: Simplify right side
   22,256.42x = 393,942,139.85
5. Step 5: Solve for x
   x = 393,942,139.85/22,256.42
6. Step 6: Final answer
   x = 17,700.16