Finding the Third Proportional to 81,360 and 123,187

Step by Step Solution

1. Step 1: Write the proportion equation
   81,360 : 123,187 = 123,187 : x
2. Step 2: Convert to fraction form
   81,360/123,187 = 123,187/x
3. Step 3: Cross multiply
   81,360x = 123,187 × 123,187
4. Step 4: Simplify right side
   81,360x = 15,175,036,969
5. Step 5: Solve for x
   x = 15,175,036,969/81,360
6. Step 6: Final answer
   x = 186,517.17