Finding the Third Proportional to 19,640 and 41,710

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640 : 41,710 = 41,710 : x
2. Step 2: Convert to fraction form
   19,640/41,710 = 41,710/x
3. Step 3: Cross multiply
   19,640x = 41,710 × 41,710
4. Step 4: Simplify right side
   19,640x = 1,739,724,100
5. Step 5: Solve for x
   x = 1,739,724,100/19,640
6. Step 6: Final answer
   x = 88,580.66