Finding the Third Proportional to 67,672 and 91,288

Step by Step Solution

1. Step 1: Write the proportion equation
   67,672 : 91,288 = 91,288 : x
2. Step 2: Convert to fraction form
   67,672/91,288 = 91,288/x
3. Step 3: Cross multiply
   67,672x = 91,288 × 91,288
4. Step 4: Simplify right side
   67,672x = 8,333,498,944
5. Step 5: Solve for x
   x = 8,333,498,944/67,672
6. Step 6: Final answer
   x = 123,145.45