Finding the Third Proportional to 63,719 and 89,121

Step by Step Solution

1. Step 1: Write the proportion equation
   63,719 : 89,121 = 89,121 : x
2. Step 2: Convert to fraction form
   63,719/89,121 = 89,121/x
3. Step 3: Cross multiply
   63,719x = 89,121 × 89,121
4. Step 4: Simplify right side
   63,719x = 7,942,552,641
5. Step 5: Solve for x
   x = 7,942,552,641/63,719
6. Step 6: Final answer
   x = 124,649.67