Finding the Fourth Proportional to 22,256.17, 30,715.98 and 12,698.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,256.17 : 30,715.98 = 12,698.42 : x
2. Step 2: Convert to fraction form
   22,256.17/30,715.98 = 12,698.42/x
3. Step 3: Cross multiply
   22,256.17x = 30,715.98 × 12,698.42
4. Step 4: Simplify right side
   22,256.17x = 390,044,493.47
5. Step 5: Solve for x
   x = 390,044,493.47/22,256.17
6. Step 6: Final answer
   x = 17,525.23