Finding the Third Proportional to 1,220,212 and 1,855,195

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,212 : 1,855,195 = 1,855,195 : x
2. Step 2: Convert to fraction form
   1,220,212/1,855,195 = 1,855,195/x
3. Step 3: Cross multiply
   1,220,212x = 1,855,195 × 1,855,195
4. Step 4: Simplify right side
   1,220,212x = 3,441,748,488,025
5. Step 5: Solve for x
   x = 3,441,748,488,025/1,220,212
6. Step 6: Final answer
   x = 2,820,615.18