Finding the Fourth Proportional to 22,361.25, 30,858.54 and 12,930.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,361.25 : 30,858.54 = 12,930.42 : x
2. Step 2: Convert to fraction form
   22,361.25/30,858.54 = 12,930.42/x
3. Step 3: Cross multiply
   22,361.25x = 30,858.54 × 12,930.42
4. Step 4: Simplify right side
   22,361.25x = 399,013,882.79
5. Step 5: Solve for x
   x = 399,013,882.79/22,361.25
6. Step 6: Final answer
   x = 17,843.99