Finding the Third Proportional to 12,387.38 and 18,581.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.38 : 18,581.63 = 18,581.63 : x
2. Step 2: Convert to fraction form
   12,387.38/18,581.63 = 18,581.63/x
3. Step 3: Cross multiply
   12,387.38x = 18,581.63 × 18,581.63
4. Step 4: Simplify right side
   12,387.38x = 345,276,787.64
5. Step 5: Solve for x
   x = 345,276,787.64/12,387.38
6. Step 6: Final answer
   x = 27,873.28