Finding the Third Proportional to 78,660 and 117,018

Step by Step Solution

1. Step 1: Write the proportion equation
   78,660 : 117,018 = 117,018 : x
2. Step 2: Convert to fraction form
   78,660/117,018 = 117,018/x
3. Step 3: Cross multiply
   78,660x = 117,018 × 117,018
4. Step 4: Simplify right side
   78,660x = 13,693,212,324
5. Step 5: Solve for x
   x = 13,693,212,324/78,660
6. Step 6: Final answer
   x = 174,081.01