Finding the Third Proportional to 81,778.50 and 168,660

Step by Step Solution

1. Step 1: Write the proportion equation
   81,778.50 : 168,660 = 168,660 : x
2. Step 2: Convert to fraction form
   81,778.50/168,660 = 168,660/x
3. Step 3: Cross multiply
   81,778.50x = 168,660 × 168,660
4. Step 4: Simplify right side
   81,778.50x = 28,446,195,600
5. Step 5: Solve for x
   x = 28,446,195,600/81,778.50
6. Step 6: Final answer
   x = 347,844.43