Finding the Fourth Proportional to 21,834.96, 30,132.72 and 12,884.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,834.96 : 30,132.72 = 12,884.64 : x
2. Step 2: Convert to fraction form
   21,834.96/30,132.72 = 12,884.64/x
3. Step 3: Cross multiply
   21,834.96x = 30,132.72 × 12,884.64
4. Step 4: Simplify right side
   21,834.96x = 388,249,249.42
5. Step 5: Solve for x
   x = 388,249,249.42/21,834.96
6. Step 6: Final answer
   x = 17,781.08