Finding the Fourth Proportional to 17,888.20, 24,663 and 12,789.76

Step by Step Solution

1. Step 1: Write the proportion equation
   17,888.20 : 24,663 = 12,789.76 : x
2. Step 2: Convert to fraction form
   17,888.20/24,663 = 12,789.76/x
3. Step 3: Cross multiply
   17,888.20x = 24,663 × 12,789.76
4. Step 4: Simplify right side
   17,888.20x = 315,433,850.88
5. Step 5: Solve for x
   x = 315,433,850.88/17,888.20
6. Step 6: Final answer
   x = 17,633.63