Finding the Third Proportional to 621,540 and 1,361,196

Step by Step Solution

1. Step 1: Write the proportion equation
   621,540 : 1,361,196 = 1,361,196 : x
2. Step 2: Convert to fraction form
   621,540/1,361,196 = 1,361,196/x
3. Step 3: Cross multiply
   621,540x = 1,361,196 × 1,361,196
4. Step 4: Simplify right side
   621,540x = 1,852,854,550,416
5. Step 5: Solve for x
   x = 1,852,854,550,416/621,540
6. Step 6: Final answer
   x = 2,981,070.49