Finding the Third Proportional to 78,610 and 170,510

Step by Step Solution

1. Step 1: Write the proportion equation
   78,610 : 170,510 = 170,510 : x
2. Step 2: Convert to fraction form
   78,610/170,510 = 170,510/x
3. Step 3: Cross multiply
   78,610x = 170,510 × 170,510
4. Step 4: Simplify right side
   78,610x = 29,073,660,100
5. Step 5: Solve for x
   x = 29,073,660,100/78,610
6. Step 6: Final answer
   x = 369,846.84