Finding the Third Proportional to 89,710 and 139,303

Step by Step Solution

1. Step 1: Write the proportion equation
   89,710 : 139,303 = 139,303 : x
2. Step 2: Convert to fraction form
   89,710/139,303 = 139,303/x
3. Step 3: Cross multiply
   89,710x = 139,303 × 139,303
4. Step 4: Simplify right side
   89,710x = 19,405,325,809
5. Step 5: Solve for x
   x = 19,405,325,809/89,710
6. Step 6: Final answer
   x = 216,311.74