Finding the Third Proportional to 78,918 and 115,443

Step by Step Solution

1. Step 1: Write the proportion equation
   78,918 : 115,443 = 115,443 : x
2. Step 2: Convert to fraction form
   78,918/115,443 = 115,443/x
3. Step 3: Cross multiply
   78,918x = 115,443 × 115,443
4. Step 4: Simplify right side
   78,918x = 13,327,086,249
5. Step 5: Solve for x
   x = 13,327,086,249/78,918
6. Step 6: Final answer
   x = 168,872.58