Finding the Third Proportional to 689,620.50 and 1,361,556

Step by Step Solution

1. Step 1: Write the proportion equation
   689,620.50 : 1,361,556 = 1,361,556 : x
2. Step 2: Convert to fraction form
   689,620.50/1,361,556 = 1,361,556/x
3. Step 3: Cross multiply
   689,620.50x = 1,361,556 × 1,361,556
4. Step 4: Simplify right side
   689,620.50x = 1,853,834,741,136
5. Step 5: Solve for x
   x = 1,853,834,741,136/689,620.50
6. Step 6: Final answer
   x = 2,688,195.52