Finding the Fourth Proportional to 21,453.96, 29,627.87 and 17,689.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,453.96 : 29,627.87 = 17,689.89 : x
2. Step 2: Convert to fraction form
   21,453.96/29,627.87 = 17,689.89/x
3. Step 3: Cross multiply
   21,453.96x = 29,627.87 × 17,689.89
4. Step 4: Simplify right side
   21,453.96x = 524,113,672.78
5. Step 5: Solve for x
   x = 524,113,672.78/21,453.96
6. Step 6: Final answer
   x = 24,429.69