Finding the Fourth Proportional to 12,540.42, 18,788.76 and 12,234.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540.42 : 18,788.76 = 12,234.24 : x
2. Step 2: Convert to fraction form
   12,540.42/18,788.76 = 12,234.24/x
3. Step 3: Cross multiply
   12,540.42x = 18,788.76 × 12,234.24
4. Step 4: Simplify right side
   12,540.42x = 229,866,199.14
5. Step 5: Solve for x
   x = 229,866,199.14/12,540.42
6. Step 6: Final answer
   x = 18,330.02