Finding the Third Proportional to 12,308.50 and 18,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,308.50 : 18,458.50 = 18,458.50 : x
2. Step 2: Convert to fraction form
   12,308.50/18,458.50 = 18,458.50/x
3. Step 3: Cross multiply
   12,308.50x = 18,458.50 × 18,458.50
4. Step 4: Simplify right side
   12,308.50x = 340,716,222.25
5. Step 5: Solve for x
   x = 340,716,222.25/12,308.50
6. Step 6: Final answer
   x = 27,681.38