Finding the Fourth Proportional to 21,864.86, 30,173.31 and 12,433.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,864.86 : 30,173.31 = 12,433.42 : x
2. Step 2: Convert to fraction form
   21,864.86/30,173.31 = 12,433.42/x
3. Step 3: Cross multiply
   21,864.86x = 30,173.31 × 12,433.42
4. Step 4: Simplify right side
   21,864.86x = 375,157,473.74
5. Step 5: Solve for x
   x = 375,157,473.74/21,864.86
6. Step 6: Final answer
   x = 17,158.01