Finding the Third Proportional to 57,162 and 87,686

Step by Step Solution

1. Step 1: Write the proportion equation
   57,162 : 87,686 = 87,686 : x
2. Step 2: Convert to fraction form
   57,162/87,686 = 87,686/x
3. Step 3: Cross multiply
   57,162x = 87,686 × 87,686
4. Step 4: Simplify right side
   57,162x = 7,688,834,596
5. Step 5: Solve for x
   x = 7,688,834,596/57,162
6. Step 6: Final answer
   x = 134,509.54