Finding the Third Proportional to 1,391,256 and 2,090,205

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391,256 : 2,090,205 = 2,090,205 : x
2. Step 2: Convert to fraction form
   1,391,256/2,090,205 = 2,090,205/x
3. Step 3: Cross multiply
   1,391,256x = 2,090,205 × 2,090,205
4. Step 4: Simplify right side
   1,391,256x = 4,368,956,942,025
5. Step 5: Solve for x
   x = 4,368,956,942,025/1,391,256
6. Step 6: Final answer
   x = 3,140,296.93