Finding the Third Proportional to 80,220 and 123,315

Step by Step Solution

1. Step 1: Write the proportion equation
   80,220 : 123,315 = 123,315 : x
2. Step 2: Convert to fraction form
   80,220/123,315 = 123,315/x
3. Step 3: Cross multiply
   80,220x = 123,315 × 123,315
4. Step 4: Simplify right side
   80,220x = 15,206,589,225
5. Step 5: Solve for x
   x = 15,206,589,225/80,220
6. Step 6: Final answer
   x = 189,561.07