Finding the Third Proportional to 72,805.50 and 109,721.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,805.50 : 109,721.25 = 109,721.25 : x
2. Step 2: Convert to fraction form
   72,805.50/109,721.25 = 109,721.25/x
3. Step 3: Cross multiply
   72,805.50x = 109,721.25 × 109,721.25
4. Step 4: Simplify right side
   72,805.50x = 12,038,752,701.56
5. Step 5: Solve for x
   x = 12,038,752,701.56/72,805.50
6. Step 6: Final answer
   x = 165,354.99