Finding the Third Proportional to 54,057.75 and 80,870.25

Step by Step Solution

1. Step 1: Write the proportion equation
   54,057.75 : 80,870.25 = 80,870.25 : x
2. Step 2: Convert to fraction form
   54,057.75/80,870.25 = 80,870.25/x
3. Step 3: Cross multiply
   54,057.75x = 80,870.25 × 80,870.25
4. Step 4: Simplify right side
   54,057.75x = 6,539,997,335.06
5. Step 5: Solve for x
   x = 6,539,997,335.06/54,057.75
6. Step 6: Final answer
   x = 120,981.68