Finding the Third Proportional to 89,131 and 139,165

Step by Step Solution

1. Step 1: Write the proportion equation
   89,131 : 139,165 = 139,165 : x
2. Step 2: Convert to fraction form
   89,131/139,165 = 139,165/x
3. Step 3: Cross multiply
   89,131x = 139,165 × 139,165
4. Step 4: Simplify right side
   89,131x = 19,366,897,225
5. Step 5: Solve for x
   x = 19,366,897,225/89,131
6. Step 6: Final answer
   x = 217,285.76