Finding the Third Proportional to 67,164 and 90,891

Step by Step Solution

1. Step 1: Write the proportion equation
   67,164 : 90,891 = 90,891 : x
2. Step 2: Convert to fraction form
   67,164/90,891 = 90,891/x
3. Step 3: Cross multiply
   67,164x = 90,891 × 90,891
4. Step 4: Simplify right side
   67,164x = 8,261,173,881
5. Step 5: Solve for x
   x = 8,261,173,881/67,164
6. Step 6: Final answer
   x = 123,000.03