Finding the Third Proportional to 355,648.50 and 770,319

Step by Step Solution

1. Step 1: Write the proportion equation
   355,648.50 : 770,319 = 770,319 : x
2. Step 2: Convert to fraction form
   355,648.50/770,319 = 770,319/x
3. Step 3: Cross multiply
   355,648.50x = 770,319 × 770,319
4. Step 4: Simplify right side
   355,648.50x = 593,391,361,761
5. Step 5: Solve for x
   x = 593,391,361,761/355,648.50
6. Step 6: Final answer
   x = 1,668,477.05