Finding the Third Proportional to 12,439.50 and 18,486

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.50 : 18,486 = 18,486 : x
2. Step 2: Convert to fraction form
   12,439.50/18,486 = 18,486/x
3. Step 3: Cross multiply
   12,439.50x = 18,486 × 18,486
4. Step 4: Simplify right side
   12,439.50x = 341,732,196
5. Step 5: Solve for x
   x = 341,732,196/12,439.50
6. Step 6: Final answer
   x = 27,471.54