Finding the Third Proportional to 89,571 and 139,803

Step by Step Solution

1. Step 1: Write the proportion equation
   89,571 : 139,803 = 139,803 : x
2. Step 2: Convert to fraction form
   89,571/139,803 = 139,803/x
3. Step 3: Cross multiply
   89,571x = 139,803 × 139,803
4. Step 4: Simplify right side
   89,571x = 19,544,878,809
5. Step 5: Solve for x
   x = 19,544,878,809/89,571
6. Step 6: Final answer
   x = 218,205.43