Finding the Fourth Proportional to 12,087.48, 18,127.38 and 8,216.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.48 : 18,127.38 = 8,216.76 : x
2. Step 2: Convert to fraction form
   12,087.48/18,127.38 = 8,216.76/x
3. Step 3: Cross multiply
   12,087.48x = 18,127.38 × 8,216.76
4. Step 4: Simplify right side
   12,087.48x = 148,948,330.89
5. Step 5: Solve for x
   x = 148,948,330.89/12,087.48
6. Step 6: Final answer
   x = 12,322.53