Finding the Third Proportional to 54,870 and 80,355

Step by Step Solution

1. Step 1: Write the proportion equation
   54,870 : 80,355 = 80,355 : x
2. Step 2: Convert to fraction form
   54,870/80,355 = 80,355/x
3. Step 3: Cross multiply
   54,870x = 80,355 × 80,355
4. Step 4: Simplify right side
   54,870x = 6,456,926,025
5. Step 5: Solve for x
   x = 6,456,926,025/54,870
6. Step 6: Final answer
   x = 117,676.80