Finding the Third Proportional to 43,786 and 67,920

Step by Step Solution

1. Step 1: Write the proportion equation
   43,786 : 67,920 = 67,920 : x
2. Step 2: Convert to fraction form
   43,786/67,920 = 67,920/x
3. Step 3: Cross multiply
   43,786x = 67,920 × 67,920
4. Step 4: Simplify right side
   43,786x = 4,613,126,400
5. Step 5: Solve for x
   x = 4,613,126,400/43,786
6. Step 6: Final answer
   x = 105,356.20