Finding the Third Proportional to 89,577 and 139,812

Step by Step Solution

1. Step 1: Write the proportion equation
   89,577 : 139,812 = 139,812 : x
2. Step 2: Convert to fraction form
   89,577/139,812 = 139,812/x
3. Step 3: Cross multiply
   89,577x = 139,812 × 139,812
4. Step 4: Simplify right side
   89,577x = 19,547,395,344
5. Step 5: Solve for x
   x = 19,547,395,344/89,577
6. Step 6: Final answer
   x = 218,218.91