Finding the Third Proportional to 1,217,640 and 1,939,212

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,640 : 1,939,212 = 1,939,212 : x
2. Step 2: Convert to fraction form
   1,217,640/1,939,212 = 1,939,212/x
3. Step 3: Cross multiply
   1,217,640x = 1,939,212 × 1,939,212
4. Step 4: Simplify right side
   1,217,640x = 3,760,543,180,944
5. Step 5: Solve for x
   x = 3,760,543,180,944/1,217,640
6. Step 6: Final answer
   x = 3,088,386.70