Finding the Third Proportional to 79,860.50 and 123,638

Step by Step Solution

1. Step 1: Write the proportion equation
   79,860.50 : 123,638 = 123,638 : x
2. Step 2: Convert to fraction form
   79,860.50/123,638 = 123,638/x
3. Step 3: Cross multiply
   79,860.50x = 123,638 × 123,638
4. Step 4: Simplify right side
   79,860.50x = 15,286,355,044
5. Step 5: Solve for x
   x = 15,286,355,044/79,860.50
6. Step 6: Final answer
   x = 191,413.21