Finding the Third Proportional to 81,342 and 123,579

Step by Step Solution

1. Step 1: Write the proportion equation
   81,342 : 123,579 = 123,579 : x
2. Step 2: Convert to fraction form
   81,342/123,579 = 123,579/x
3. Step 3: Cross multiply
   81,342x = 123,579 × 123,579
4. Step 4: Simplify right side
   81,342x = 15,271,769,241
5. Step 5: Solve for x
   x = 15,271,769,241/81,342
6. Step 6: Final answer
   x = 187,747.65