Finding the Third Proportional to 63,810 and 89,418

Step by Step Solution

1. Step 1: Write the proportion equation
   63,810 : 89,418 = 89,418 : x
2. Step 2: Convert to fraction form
   63,810/89,418 = 89,418/x
3. Step 3: Cross multiply
   63,810x = 89,418 × 89,418
4. Step 4: Simplify right side
   63,810x = 7,995,578,724
5. Step 5: Solve for x
   x = 7,995,578,724/63,810
6. Step 6: Final answer
   x = 125,302.91