Finding the Third Proportional to 42,589 and 90,641

Step by Step Solution

1. Step 1: Write the proportion equation
   42,589 : 90,641 = 90,641 : x
2. Step 2: Convert to fraction form
   42,589/90,641 = 90,641/x
3. Step 3: Cross multiply
   42,589x = 90,641 × 90,641
4. Step 4: Simplify right side
   42,589x = 8,215,790,881
5. Step 5: Solve for x
   x = 8,215,790,881/42,589
6. Step 6: Final answer
   x = 192,908.75