Finding the Third Proportional to 80,478 and 120,290

Step by Step Solution

1. Step 1: Write the proportion equation
   80,478 : 120,290 = 120,290 : x
2. Step 2: Convert to fraction form
   80,478/120,290 = 120,290/x
3. Step 3: Cross multiply
   80,478x = 120,290 × 120,290
4. Step 4: Simplify right side
   80,478x = 14,469,684,100
5. Step 5: Solve for x
   x = 14,469,684,100/80,478
6. Step 6: Final answer
   x = 179,796.77