Finding the Third Proportional to 271,450.50 and 422,688

Step by Step Solution

1. Step 1: Write the proportion equation
   271,450.50 : 422,688 = 422,688 : x
2. Step 2: Convert to fraction form
   271,450.50/422,688 = 422,688/x
3. Step 3: Cross multiply
   271,450.50x = 422,688 × 422,688
4. Step 4: Simplify right side
   271,450.50x = 178,665,145,344
5. Step 5: Solve for x
   x = 178,665,145,344/271,450.50
6. Step 6: Final answer
   x = 658,186.83