Finding the Third Proportional to 80,391 and 123,369

Step by Step Solution

1. Step 1: Write the proportion equation
   80,391 : 123,369 = 123,369 : x
2. Step 2: Convert to fraction form
   80,391/123,369 = 123,369/x
3. Step 3: Cross multiply
   80,391x = 123,369 × 123,369
4. Step 4: Simplify right side
   80,391x = 15,219,910,161
5. Step 5: Solve for x
   x = 15,219,910,161/80,391
6. Step 6: Final answer
   x = 189,323.56