Finding the Third Proportional to 67,012 and 91,009

Step by Step Solution

1. Step 1: Write the proportion equation
   67,012 : 91,009 = 91,009 : x
2. Step 2: Convert to fraction form
   67,012/91,009 = 91,009/x
3. Step 3: Cross multiply
   67,012x = 91,009 × 91,009
4. Step 4: Simplify right side
   67,012x = 8,282,638,081
5. Step 5: Solve for x
   x = 8,282,638,081/67,012
6. Step 6: Final answer
   x = 123,599.33