Finding the Third Proportional to 302,017.50 and 408,738

Step by Step Solution

1. Step 1: Write the proportion equation
   302,017.50 : 408,738 = 408,738 : x
2. Step 2: Convert to fraction form
   302,017.50/408,738 = 408,738/x
3. Step 3: Cross multiply
   302,017.50x = 408,738 × 408,738
4. Step 4: Simplify right side
   302,017.50x = 167,066,752,644
5. Step 5: Solve for x
   x = 167,066,752,644/302,017.50
6. Step 6: Final answer
   x = 553,169.11