Finding the Third Proportional to 80,878.50 and 109,883.25

Step by Step Solution

1. Step 1: Write the proportion equation
   80,878.50 : 109,883.25 = 109,883.25 : x
2. Step 2: Convert to fraction form
   80,878.50/109,883.25 = 109,883.25/x
3. Step 3: Cross multiply
   80,878.50x = 109,883.25 × 109,883.25
4. Step 4: Simplify right side
   80,878.50x = 12,074,328,630.56
5. Step 5: Solve for x
   x = 12,074,328,630.56/80,878.50
6. Step 6: Final answer
   x = 149,289.72