Finding the Third Proportional to 57,723 and 86,586.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,723 : 86,586.50 = 86,586.50 : x
2. Step 2: Convert to fraction form
   57,723/86,586.50 = 86,586.50/x
3. Step 3: Cross multiply
   57,723x = 86,586.50 × 86,586.50
4. Step 4: Simplify right side
   57,723x = 7,497,221,982.25
5. Step 5: Solve for x
   x = 7,497,221,982.25/57,723
6. Step 6: Final answer
   x = 129,882.75