Finding the Fourth Proportional to 21,397.83, 29,527.50 and 12,444.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,397.83 : 29,527.50 = 12,444.72 : x
2. Step 2: Convert to fraction form
   21,397.83/29,527.50 = 12,444.72/x
3. Step 3: Cross multiply
   21,397.83x = 29,527.50 × 12,444.72
4. Step 4: Simplify right side
   21,397.83x = 367,461,469.80
5. Step 5: Solve for x
   x = 367,461,469.80/21,397.83
6. Step 6: Final answer
   x = 17,172.84