Finding the Fourth Proportional to 12,494.61, 18,609.30 and 12,434.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,494.61 : 18,609.30 = 12,434.27 : x
2. Step 2: Convert to fraction form
   12,494.61/18,609.30 = 12,434.27/x
3. Step 3: Cross multiply
   12,494.61x = 18,609.30 × 12,434.27
4. Step 4: Simplify right side
   12,494.61x = 231,392,967.66
5. Step 5: Solve for x
   x = 231,392,967.66/12,494.61
6. Step 6: Final answer
   x = 18,519.42