Finding the Third Proportional to 91,578 and 141,723

Step by Step Solution

1. Step 1: Write the proportion equation
   91,578 : 141,723 = 141,723 : x
2. Step 2: Convert to fraction form
   91,578/141,723 = 141,723/x
3. Step 3: Cross multiply
   91,578x = 141,723 × 141,723
4. Step 4: Simplify right side
   91,578x = 20,085,408,729
5. Step 5: Solve for x
   x = 20,085,408,729/91,578
6. Step 6: Final answer
   x = 219,325.70