Finding the Fourth Proportional to 21,849.33, 30,154.64 and 12,419.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,849.33 : 30,154.64 = 12,419.31 : x
2. Step 2: Convert to fraction form
   21,849.33/30,154.64 = 12,419.31/x
3. Step 3: Cross multiply
   21,849.33x = 30,154.64 × 12,419.31
4. Step 4: Simplify right side
   21,849.33x = 374,499,822.10
5. Step 5: Solve for x
   x = 374,499,822.10/21,849.33
6. Step 6: Final answer
   x = 17,140.11