Finding the Fourth Proportional to 17,960.28, 24,759.48 and 12,638.56

Step by Step Solution

1. Step 1: Write the proportion equation
   17,960.28 : 24,759.48 = 12,638.56 : x
2. Step 2: Convert to fraction form
   17,960.28/24,759.48 = 12,638.56/x
3. Step 3: Cross multiply
   17,960.28x = 24,759.48 × 12,638.56
4. Step 4: Simplify right side
   17,960.28x = 312,924,173.55
5. Step 5: Solve for x
   x = 312,924,173.55/17,960.28
6. Step 6: Final answer
   x = 17,423.12