Finding the Third Proportional to 12,687,856 and 18,087,000

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687,856 : 18,087,000 = 18,087,000 : x
2. Step 2: Convert to fraction form
   12,687,856/18,087,000 = 18,087,000/x
3. Step 3: Cross multiply
   12,687,856x = 18,087,000 × 18,087,000
4. Step 4: Simplify right side
   12,687,856x = 327,139,569,000,000
5. Step 5: Solve for x
   x = 327,139,569,000,000/12,687,856
6. Step 6: Final answer
   x = 25,783,676.06