Finding the Third Proportional to 78,355 and 170,384

Step by Step Solution

1. Step 1: Write the proportion equation
   78,355 : 170,384 = 170,384 : x
2. Step 2: Convert to fraction form
   78,355/170,384 = 170,384/x
3. Step 3: Cross multiply
   78,355x = 170,384 × 170,384
4. Step 4: Simplify right side
   78,355x = 29,030,707,456
5. Step 5: Solve for x
   x = 29,030,707,456/78,355
6. Step 6: Final answer
   x = 370,502.30