Finding the Third Proportional to 78,640.50 and 169,795.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,640.50 : 169,795.50 = 169,795.50 : x
2. Step 2: Convert to fraction form
   78,640.50/169,795.50 = 169,795.50/x
3. Step 3: Cross multiply
   78,640.50x = 169,795.50 × 169,795.50
4. Step 4: Simplify right side
   78,640.50x = 28,830,511,820.25
5. Step 5: Solve for x
   x = 28,830,511,820.25/78,640.50
6. Step 6: Final answer
   x = 366,611.50