Finding the Fourth Proportional to 21,843.56, 30,144.13 and 12,412.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,843.56 : 30,144.13 = 12,412.13 : x
2. Step 2: Convert to fraction form
   21,843.56/30,144.13 = 12,412.13/x
3. Step 3: Cross multiply
   21,843.56x = 30,144.13 × 12,412.13
4. Step 4: Simplify right side
   21,843.56x = 374,152,678.55
5. Step 5: Solve for x
   x = 374,152,678.55/21,843.56
6. Step 6: Final answer
   x = 17,128.74