Finding the Third Proportional to 78,519.50 and 171,707

Step by Step Solution

1. Step 1: Write the proportion equation
   78,519.50 : 171,707 = 171,707 : x
2. Step 2: Convert to fraction form
   78,519.50/171,707 = 171,707/x
3. Step 3: Cross multiply
   78,519.50x = 171,707 × 171,707
4. Step 4: Simplify right side
   78,519.50x = 29,483,293,849
5. Step 5: Solve for x
   x = 29,483,293,849/78,519.50
6. Step 6: Final answer
   x = 375,490.09