Finding the Third Proportional to 67,143 and 90,864

Step by Step Solution

1. Step 1: Write the proportion equation
   67,143 : 90,864 = 90,864 : x
2. Step 2: Convert to fraction form
   67,143/90,864 = 90,864/x
3. Step 3: Cross multiply
   67,143x = 90,864 × 90,864
4. Step 4: Simplify right side
   67,143x = 8,256,266,496
5. Step 5: Solve for x
   x = 8,256,266,496/67,143
6. Step 6: Final answer
   x = 122,965.41