Finding the Fourth Proportional to 12,031.54, 18,028.64 and 8,340.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.54 : 18,028.64 = 8,340.98 : x
2. Step 2: Convert to fraction form
   12,031.54/18,028.64 = 8,340.98/x
3. Step 3: Cross multiply
   12,031.54x = 18,028.64 × 8,340.98
4. Step 4: Simplify right side
   12,031.54x = 150,376,456.38
5. Step 5: Solve for x
   x = 150,376,456.38/12,031.54
6. Step 6: Final answer
   x = 12,498.52