Finding the Third Proportional to 12,940 and 19,390

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940 : 19,390 = 19,390 : x
2. Step 2: Convert to fraction form
   12,940/19,390 = 19,390/x
3. Step 3: Cross multiply
   12,940x = 19,390 × 19,390
4. Step 4: Simplify right side
   12,940x = 375,972,100
5. Step 5: Solve for x
   x = 375,972,100/12,940
6. Step 6: Final answer
   x = 29,055.03