Finding the Third Proportional to 12,087.56 and 18,478.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.56 : 18,478.69 = 18,478.69 : x
2. Step 2: Convert to fraction form
   12,087.56/18,478.69 = 18,478.69/x
3. Step 3: Cross multiply
   12,087.56x = 18,478.69 × 18,478.69
4. Step 4: Simplify right side
   12,087.56x = 341,461,891.72
5. Step 5: Solve for x
   x = 341,461,891.72/12,087.56
6. Step 6: Final answer
   x = 28,249.03