Finding the Fourth Proportional to 21,537.50, 29,723.58 and 12,107.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,537.50 : 29,723.58 = 12,107.89 : x
2. Step 2: Convert to fraction form
   21,537.50/29,723.58 = 12,107.89/x
3. Step 3: Cross multiply
   21,537.50x = 29,723.58 × 12,107.89
4. Step 4: Simplify right side
   21,537.50x = 359,889,627.89
5. Step 5: Solve for x
   x = 359,889,627.89/21,537.50
6. Step 6: Final answer
   x = 16,709.91