Finding the Third Proportional to 81,621.50 and 171,505

Step by Step Solution

1. Step 1: Write the proportion equation
   81,621.50 : 171,505 = 171,505 : x
2. Step 2: Convert to fraction form
   81,621.50/171,505 = 171,505/x
3. Step 3: Cross multiply
   81,621.50x = 171,505 × 171,505
4. Step 4: Simplify right side
   81,621.50x = 29,413,965,025
5. Step 5: Solve for x
   x = 29,413,965,025/81,621.50
6. Step 6: Final answer
   x = 360,370.31