Finding the Fourth Proportional to 21,834.84, 30,132.18 and 12,403.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,834.84 : 30,132.18 = 12,403.92 : x
2. Step 2: Convert to fraction form
   21,834.84/30,132.18 = 12,403.92/x
3. Step 3: Cross multiply
   21,834.84x = 30,132.18 × 12,403.92
4. Step 4: Simplify right side
   21,834.84x = 373,757,150.15
5. Step 5: Solve for x
   x = 373,757,150.15/21,834.84
6. Step 6: Final answer
   x = 17,117.47