Finding the Third Proportional to 81,720 and 123,273

Step by Step Solution

1. Step 1: Write the proportion equation
   81,720 : 123,273 = 123,273 : x
2. Step 2: Convert to fraction form
   81,720/123,273 = 123,273/x
3. Step 3: Cross multiply
   81,720x = 123,273 × 123,273
4. Step 4: Simplify right side
   81,720x = 15,196,232,529
5. Step 5: Solve for x
   x = 15,196,232,529/81,720
6. Step 6: Final answer
   x = 185,954.88