Finding the Third Proportional to 78,806.50 and 171,009

Step by Step Solution

1. Step 1: Write the proportion equation
   78,806.50 : 171,009 = 171,009 : x
2. Step 2: Convert to fraction form
   78,806.50/171,009 = 171,009/x
3. Step 3: Cross multiply
   78,806.50x = 171,009 × 171,009
4. Step 4: Simplify right side
   78,806.50x = 29,244,078,081
5. Step 5: Solve for x
   x = 29,244,078,081/78,806.50
6. Step 6: Final answer
   x = 371,087.13