Finding the Third Proportional to 67,419 and 90,759

Step by Step Solution

1. Step 1: Write the proportion equation
   67,419 : 90,759 = 90,759 : x
2. Step 2: Convert to fraction form
   67,419/90,759 = 90,759/x
3. Step 3: Cross multiply
   67,419x = 90,759 × 90,759
4. Step 4: Simplify right side
   67,419x = 8,237,196,081
5. Step 5: Solve for x
   x = 8,237,196,081/67,419
6. Step 6: Final answer
   x = 122,179.15