Finding the Fourth Proportional to 21,834.34, 30,131.49 and 12,403.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,834.34 : 30,131.49 = 12,403.42 : x
2. Step 2: Convert to fraction form
   21,834.34/30,131.49 = 12,403.42/x
3. Step 3: Cross multiply
   21,834.34x = 30,131.49 × 12,403.42
4. Step 4: Simplify right side
   21,834.34x = 373,733,525.70
5. Step 5: Solve for x
   x = 373,733,525.70/21,834.34
6. Step 6: Final answer
   x = 17,116.78