Finding the Fourth Proportional to 21,874.42, 30,186.43 and 12,442.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,874.42 : 30,186.43 = 12,442.96 : x
2. Step 2: Convert to fraction form
   21,874.42/30,186.43 = 12,442.96/x
3. Step 3: Cross multiply
   21,874.42x = 30,186.43 × 12,442.96
4. Step 4: Simplify right side
   21,874.42x = 375,608,541.03
5. Step 5: Solve for x
   x = 375,608,541.03/21,874.42
6. Step 6: Final answer
   x = 17,171.13