Finding the Third Proportional to 1,231,590 and 1,961,216

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231,590 : 1,961,216 = 1,961,216 : x
2. Step 2: Convert to fraction form
   1,231,590/1,961,216 = 1,961,216/x
3. Step 3: Cross multiply
   1,231,590x = 1,961,216 × 1,961,216
4. Step 4: Simplify right side
   1,231,590x = 3,846,368,198,656
5. Step 5: Solve for x
   x = 3,846,368,198,656/1,231,590
6. Step 6: Final answer
   x = 3,123,091.45