Finding the Third Proportional to 79,864 and 123,640

Step by Step Solution

1. Step 1: Write the proportion equation
   79,864 : 123,640 = 123,640 : x
2. Step 2: Convert to fraction form
   79,864/123,640 = 123,640/x
3. Step 3: Cross multiply
   79,864x = 123,640 × 123,640
4. Step 4: Simplify right side
   79,864x = 15,286,849,600
5. Step 5: Solve for x
   x = 15,286,849,600/79,864
6. Step 6: Final answer
   x = 191,411.02