Finding the Third Proportional to 12,689.16 and 18,037.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.16 : 18,037.05 = 18,037.05 : x
2. Step 2: Convert to fraction form
   12,689.16/18,037.05 = 18,037.05/x
3. Step 3: Cross multiply
   12,689.16x = 18,037.05 × 18,037.05
4. Step 4: Simplify right side
   12,689.16x = 325,335,341.80
5. Step 5: Solve for x
   x = 325,335,341.80/12,689.16
6. Step 6: Final answer
   x = 25,638.85