Finding the Third Proportional to 67,992 and 91,608

Step by Step Solution

1. Step 1: Write the proportion equation
   67,992 : 91,608 = 91,608 : x
2. Step 2: Convert to fraction form
   67,992/91,608 = 91,608/x
3. Step 3: Cross multiply
   67,992x = 91,608 × 91,608
4. Step 4: Simplify right side
   67,992x = 8,392,025,664
5. Step 5: Solve for x
   x = 8,392,025,664/67,992
6. Step 6: Final answer
   x = 123,426.66