Finding the Fourth Proportional to 17,499.72, 24,144.30 and 15,815.73

Step by Step Solution

1. Step 1: Write the proportion equation
   17,499.72 : 24,144.30 = 15,815.73 : x
2. Step 2: Convert to fraction form
   17,499.72/24,144.30 = 15,815.73/x
3. Step 3: Cross multiply
   17,499.72x = 24,144.30 × 15,815.73
4. Step 4: Simplify right side
   17,499.72x = 381,859,729.84
5. Step 5: Solve for x
   x = 381,859,729.84/17,499.72
6. Step 6: Final answer
   x = 21,820.91