Finding the Third Proportional to 1,220,210 and 1,855,192

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,210 : 1,855,192 = 1,855,192 : x
2. Step 2: Convert to fraction form
   1,220,210/1,855,192 = 1,855,192/x
3. Step 3: Cross multiply
   1,220,210x = 1,855,192 × 1,855,192
4. Step 4: Simplify right side
   1,220,210x = 3,441,737,356,864
5. Step 5: Solve for x
   x = 3,441,737,356,864/1,220,210
6. Step 6: Final answer
   x = 2,820,610.68