Finding the Third Proportional to 12,790 and 19,109

Step by Step Solution

1. Step 1: Write the proportion equation
   12,790 : 19,109 = 19,109 : x
2. Step 2: Convert to fraction form
   12,790/19,109 = 19,109/x
3. Step 3: Cross multiply
   12,790x = 19,109 × 19,109
4. Step 4: Simplify right side
   12,790x = 365,153,881
5. Step 5: Solve for x
   x = 365,153,881/12,790
6. Step 6: Final answer
   x = 28,549.95