Finding the Third Proportional to 109,905 and 171,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,905 : 171,418.50 = 171,418.50 : x
2. Step 2: Convert to fraction form
   109,905/171,418.50 = 171,418.50/x
3. Step 3: Cross multiply
   109,905x = 171,418.50 × 171,418.50
4. Step 4: Simplify right side
   109,905x = 29,384,302,142.25
5. Step 5: Solve for x
   x = 29,384,302,142.25/109,905
6. Step 6: Final answer
   x = 267,360.92