Finding the Third Proportional to 78,662.25 and 170,446.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,662.25 : 170,446.50 = 170,446.50 : x
2. Step 2: Convert to fraction form
   78,662.25/170,446.50 = 170,446.50/x
3. Step 3: Cross multiply
   78,662.25x = 170,446.50 × 170,446.50
4. Step 4: Simplify right side
   78,662.25x = 29,052,009,362.25
5. Step 5: Solve for x
   x = 29,052,009,362.25/78,662.25
6. Step 6: Final answer
   x = 369,325.94