Finding the Third Proportional to 12,009 and 17,787

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009 : 17,787 = 17,787 : x
2. Step 2: Convert to fraction form
   12,009/17,787 = 17,787/x
3. Step 3: Cross multiply
   12,009x = 17,787 × 17,787
4. Step 4: Simplify right side
   12,009x = 316,377,369
5. Step 5: Solve for x
   x = 316,377,369/12,009
6. Step 6: Final answer
   x = 26,345.02